83 FR 10408 - Airworthiness Directives; Bombardier, Inc., Airplanes
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration Federal Register Volume 83, Issue 47 (March 9, 2018)
Federal Aviation Administration
Federal Register Volume 83, Issue 47 (March 9, 2018)
| Page Range | 10408-10411 | |
| FR Document | 2018-04720 |
[Federal Register Volume 83, Number 47 (Friday, March 9, 2018)] [Proposed Rules] [Pages 10408-10411] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2018-04720] [[Page 10408]] ======================================================================= ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2018-0160; Product Identifier 2017-NM-139-AD] RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc., Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). ----------------------------------------------------------------------- SUMMARY: We propose to supersede Airworthiness Directive (AD) 2016-24- 03, which applies to certain Bombardier, Inc., Model DHC-8-400 series airplanes. AD 2016-24-03 requires repetitive detailed inspections of barrel nuts and cradles, a check of the bolt torque of the preload indicating (PLI) washers, and corrective actions if necessary. Since we issued AD 2016-24-03, the manufacturer has developed a modification that, when incorporated, terminates the repetitive inspections. This proposed AD would require modifying the airplane by installing a sealing disk to a certain location and replacing certain barrel nuts. We are proposing this AD to address the unsafe condition on these products. DATES: We must receive comments on this proposed AD by April 23, 2018. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods:Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments. Fax: 202-493-2251. Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this NPRM, contact Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000; fax 416-375- 4539; email [email protected]; internet http://www.bombardier.com. You may view this referenced service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. Examining the AD Docket You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018- 0160; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone 800-647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Aziz Ahmed, Aerospace Engineer, Airframe and Mechanical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7329; fax 516-794-5531. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ``Docket No. FAA-2018-0160; Product Identifier 2017-NM-139-AD'' at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD based on those comments. We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion We issued AD 2016-24-03, Amendment 39-18720 (81 FR 88623, December 8, 2016) (``AD 2016-24-03''), for certain Bombardier, Inc., Model DHC- 8-400 series airplanes. AD 2016-24-03 requires repetitive detailed inspections of barrel nuts and cradles, a check of the bolt torque of the PLI washers, and corrective action if necessary. AD 2016-24-03 resulted from reports of cracked and corroded barrel nuts found at the mid-spar location of the horizontal-stabilizer-to-vertical-stabilizer attachment joint. We issued AD 2016-24-03 to detect and correct cracked and corroded barrel nuts, which could compromise the structural integrity of the vertical-stabilizer attachment joints and lead to loss of control of the airplane. Actions Since AD 2016-24-03 Was Issued Since we issued AD 2016-24-03, Bombardier, Inc. has issued new service information that describes a modification. We have determined that accomplishment of this modification will address the unsafe condition and terminate the repetitive inspections required by AD 2016- 24-03. This modification was applied to certain airplanes in production. Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF- 2015-13R1, dated June 26, 2017 (referred to after this as the Mandatory Continuing Airworthiness Information, or ``the MCAI''), to correct an unsafe condition for certain Bombardier, Inc., Model DHC-8-400 series airplanes. The MCAI states: There has been one in-service report of a cracked and corroded barrel nut, part number (P/N) DSC228-12, found at the mid-spar location of the horizontal stabilizer to vertical stabilizer attachment joint. There have also been two other reports of corroded barrel nuts found at mid-spar locations. Preliminary investigation determined that the cracking is initiated by corrosion. Further investigation confirmed that the corrosion was caused by inadequate cadmium plating on the barrel nuts. Failure of the barrel nuts could compromise the structural integrity of the joint and could lead to loss of control of the aeroplane. The original version of this [Canadian] AD was issued to mandate the initial and repetitive inspections of the barrel nuts [and cradles for cracks and corrosion] at each of the horizontal stabilizer to vertical stabilizer attachment joints. Revision 1 of this [Canadian] AD is issued to terminate the repetitive inspection requirement by requiring the incorporation of a modification to install a sealing disc at the middle spar location of the horizontal stabilizer to vertical stabilizer attachment joint, and the replacement of the DSC228 series barrel nuts with B0203073 series barrel nuts that are more resistant to corrosion. The applicability has been changed to account for the introduction of the modifications in production. Required actions include a bolt preload check of the PLI washers and applicable corrective actions (retorque of the bolts and replacement of the barrel nut), a detailed inspection of cracked or broken barrel nuts for damaged bores of the fittings, replacement of discrepant barrel nuts (those with signs of structural damaged, corrosion, or cracking, or having a part number other than B0203073 series), adding an aluminum sealing disk to the [[Page 10409]] mid-spar barrel nut bore, and repair of damage and corrosion. You may examine the MCAI in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018- 0160. Explanation of Changes From AD 2016-24-03 In paragraph (h)(2) of AD 2016-24-03, we stated ``. . . replace the barrel nut accomplish corrective actions in accordance with [methods approved by the FAA, TCCA, or Bombardier's TCCA Design Approval Organization].'' We intended to match the language in the MCAI and allow operators to either replace the discrepant barrel nut in accordance with the applicable service information or to request an alternative method of compliance (AMOC). In addition, we left ``paragraph (h)(2)'' out of the credit paragraph in AD 2016-24-03. We have updated the retained requirements in this proposed AD to correct those errors. Related Service Information Under 1 CFR Part 51 Bombardier, Inc. has issued the following service information. Bombardier Service Bulletin 84-55-06, dated January 31, 2017. The service information describes procedures for installing an aluminum sealing disk at the mid-spar location of the vertical stabilizer. Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017. The service information describes procedures for an inspection for part number and damage of the barrel nuts at the horizontal-to-vertical-stabilizer attachment joints, and replacement of discrepant parts. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. FAA's Determination and Requirements of This Proposed AD This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to our bilateral agreement with the State of Design Authority, we have been notified of the unsafe condition described in the MCAI and service information referenced above. We are proposing this AD because we evaluated all pertinent information and determined an unsafe condition exists and is likely to exist or develop on other products of the same type design. Differences Between This Proposed AD and the MCAI or Service Information The applicability of Canadian AD CF-2015-13R1, dated June 26, 2017, is limited to Bombardier, Inc., Model DHC-8-400, -401 and -402 airplanes, serial numbers 4001 through 4547. However, the applicability of this proposed AD includes Bombardier, Inc., Model DHC-8-400, -401 and -402 airplanes, serial numbers 4001 and subsequent. Because the affected barrel nuts are rotable parts, we have determined that discrepant parts could later be installed on airplanes that were initially delivered with B0203073 series barrel nuts, thereby subjecting those airplanes to the unsafe condition. Costs of Compliance We estimate that this proposed AD affects 54 airplanes of U.S. registry. We estimate the following costs to comply with this proposed AD: Estimated Costs ---------------------------------------------------------------------------------------------------------------- Cost per Cost on U.S. Action Labor cost Parts cost product operators ---------------------------------------------------------------------------------------------------------------- Inspections (retained actions from 8 work-hours x $85 per hour $0 $680 $36,720 AD 2016-24-03). = $680. Sealing disk installation (new 4 work-hours x $85 per hour 781 1,121 60,534 proposed action). = $340. Replacement of DSC228 series barrel 2 work-hours x $85 per hour 2,236 2,406 129,924 nuts (new proposed action). = $170. ---------------------------------------------------------------------------------------------------------------- We estimate the following costs to do any necessary replacements that would be required based on the results of the inspection. We have no way of determining the number of aircraft that might need these replacements: On-Condition Costs ---------------------------------------------------------------------------------------------------------------- Cost per Action Labor cost Parts cost product ---------------------------------------------------------------------------------------------------------------- Replacement (retained action from AD 2016- 2 work-hours x $85 per hour = $170. $8,881 $9,051 24-03). ---------------------------------------------------------------------------------------------------------------- We have received no definitive data that would enable us to provide cost estimates for the on-condition actions specified in this proposed AD. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. ``Subtitle VII: Aviation Programs,'' describes in more detail the scope of the Agency's authority. We are issuing this rulemaking under the authority described in ``Subtitle VII, Part A, Subpart III, Section 44701: General requirements.'' Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. This AD is issued in accordance with authority delegated by the Executive Director, Aircraft Certification Service, as authorized by FAA Order 8000.51C. In accordance with that order, issuance of ADs is normally a function of the Compliance and Airworthiness Division, but during this transition period, the Executive Director has [[Page 10410]] delegated the authority to issue ADs applicable to transport category airplanes to the Director of the System Oversight Division. Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: 1. Is not a ``significant regulatory action'' under Executive Order 12866; 2. Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); 3. Will not affect intrastate aviation in Alaska; and 4. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by removing Airworthiness Directive (AD) 2016-24-03, Amendment 39-18720 (81 FR 88623, December 8, 2016), and adding the following new AD: Bombardier, Inc.: Docket No. FAA-2018-0160; Product Identifier 2017- NM-139-AD. (a) Comments Due Date We must receive comments by April 23, 2018. (b) Affected ADs This AD replaces AD 2016-24-03, Amendment 39-18720 (81 FR 88623, December 8, 2016) (``AD 2016-24-03''). (c) Applicability This AD applies to Bombardier, Inc., Model DHC-8-400, -401 and - 402 airplanes, certificated in any category, serial numbers 4001 and subsequent. (d) Subject Air Transport Association (ATA) of America Code 55, Stabilizers. (e) Reason This AD was prompted by reports of cracked and corroded barrel nuts found at the mid-spar location of the horizontal-stabilizer-to- vertical-stabilizer attachment joint, and the issuance of new service information that includes a terminal modification. We are issuing this AD to detect and correct cracked and corroded barrel nuts, which could compromise the structural integrity of the vertical-stabilizer attachment joints and lead to loss of control of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Retained Detailed Inspection of Barrel Nuts for Cracks and Corrosion, With No Changes This paragraph restates the requirements of paragraphs (g)(1) and (g)(2) of AD 2016-24-03, with no changes. (1) For airplanes that have accumulated 5,400 flight hours or more, or have been in service 32 months or more since the date of issuance of the original certificate of airworthiness or the date of issuance of the original export certificate of airworthiness, as of January 12, 2017 (the effective date of AD 2016-24-03): Within 600 flight hours or 4 months, whichever occurs first after January 12, 2017, do a detailed visual inspection for signs of cracks and corrosion of the barrel nut and cradle, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Alert Service Bulletin A84-55-04, Revision C, dated May 3, 2016. (2) For airplanes that have less than 5,400 flight hours, and have been in-service for less than 32 months since the date of issuance of the original certificate of airworthiness or the date of issuance of the original export certificate of airworthiness, as of January 12, 2017: Before the accumulation of 6,000 total flight hours or 36 months since the date of issuance of the original certificate of airworthiness or the date of issuance of the original export certificate of airworthiness, whichever occurs first, do a detailed visual inspection of the barrel nut for signs of cracks and corrosion of the barrel nut and cradle, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Alert Service Bulletin A84-55-04, Revision C, dated May 3, 2016. (h) Retained Corrective Actions, Detailed Inspection, and Repetitive Inspections, With New Service Information, Reference to Terminating Action, and Reference to Corrective Actions This paragraph restates the requirements of paragraph (h) of AD 2016-24-03, with new service information and terminating action. Depending on the findings of any inspection required by paragraphs (g) and (j) of this AD, do the applicable actions in paragraphs (h)(1), (h)(2), (h)(3), and (h)(4) of this AD. Accomplishment of the actions required by paragraphs (l) and (m) of this AD, as applicable, terminates the requirements of this paragraph. (1) If any barrel nut or cradle is found cracked or broken, before further flight, replace the barrel nut and associated hardware, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017. (i) Concurrently with the replacement of any barrel nut, do a detailed inspection for corrosion and damage of the bore of the fitting, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017, and, before further flight, repair all corrosion and damage, in accordance with Bombardier Repair Drawing (RD) 8/4-55-1143, Issue 1, dated May 21, 2015. If the bore of the fitting cannot be repaired in accordance with Bombardier RD 8/4-55-1143, Issue 1, dated May 21, 2015, accomplish corrective actions in accordance with the procedures specified in paragraph (q)(2) of this AD. (ii) Within 600 flight hours or 4 months, whichever occurs first, after the replacement of a cracked barrel nut, replace the remaining barrel nuts and their associated hardware at the horizontal-stabilizer-to-vertical-stabilizer attachment joints, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017. (2) If any corrosion is found on any barrel nut on the front or rear-spar joints, before further flight, replace the barrel nut in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017, or accomplish corrective actions in accordance with the procedures specified in paragraph (q)(2) of this AD. (3) If any corrosion above level 1, as defined in Bombardier Alert Service Bulletin A84-55-04, Revision C, dated May 3, 2016, is found on a barrel nut at the mid-spar joint, before further flight, replace the barrel nut and accomplish corrective actions in accordance with the procedures specified in paragraph (q)(2) of this AD. (4) If all corrosion found is at level 1 or below, as defined in Bombardier Alert Service Bulletin A84-55-04, Revision C, dated May 3, 2016, on a barrel nut at the mid-spar joint, repeat the inspection specified in paragraph (g) of this AD at intervals not to exceed 600 flight hours or 4 months, whichever occurs first, until completion of the actions required by paragraph (k) of this AD. (i) Retained Preload Indicating (PLI) Washer Check, With New Terminating Action This paragraph restates the requirements of paragraph (i) of AD 2016-24-03, with new terminating action. For airplanes with PLI washers installed at the front and rear-spar joints, before further flight after accomplishing any inspection required by [[Page 10411]] paragraph (g) of this AD and all applicable corrective actions required by paragraph (h) of this AD, check the bolt preload, and do all applicable corrective actions, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Alert Service Bulletin A84-55-04, Revision C, dated May 3, 2016. Do all applicable corrective actions before further flight. Accomplishment of the actions required by paragraphs (l) and (m) of this AD, as applicable, terminates the requirements of this paragraph. (j) Retained Repetitive Inspection Interval, With New Terminating Action This paragraph restates the requirements of paragraph (j) of AD 2016-24-03, with new terminating action. Repeat the inspection and preload check required by paragraphs (g) and (i) of this AD at intervals not to exceed 3,600 flight hours or 18 months, whichever occurs first, except as provided by paragraph (k) of this AD. Accomplishment of the actions required by paragraphs (l) and (m) of this AD, as applicable, terminates the requirements of this paragraph. (k) Retained Optional Barrel Nut Replacement, With New Service Information This paragraph restates the provisions of paragraph (k) of AD 2016-24-03, with new service information. Inspection and replacement of all barrel nuts at the horizontal-stabilizer-to-vertical- stabilizer attachment joints, in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017, extends the next inspection required by paragraph (j) of this AD to within 6,000 flight hours or 36 months, whichever occurs first, after accomplishing the replacement. (l) New Requirement of This AD: Sealing Disk Installation Within 8,000 flight hours or 48 months, whichever occurs first, after the effective date of this AD, install a sealing disk at the mid-spar location of the vertical stabilizer in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-06, dated January 31, 2017. Accomplishment of the actions required by paragraphs (l) and (m) of this AD, as applicable, terminates the requirements of paragraphs (h), (i), and (j) of this AD. (m) New Requirement of This AD: Replacement of DSC228 Series Barrel Nuts For Bombardier, Inc., Model DHC-8-400, -401 and -402 airplanes, serial numbers 4001 through 4524 inclusive: Within 8,000 flight hours or 48 months, whichever occurs first, after the effective date of this AD, replace all DSC228 series barrel nuts at the horizontal- stabilizer-to-vertical-stabilizer attachment joints with B0203073 series barrel nuts in accordance with paragraph 3.B., ``Procedure,'' of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-08, Revision A, dated August 2, 2017. Accomplishment of the actions required by paragraphs (l) and (m) of this AD, as applicable, terminates the requirements of paragraphs (h), (i), and (j) of this AD. (n) Parts Installation Prohibition After modification of an airplane as required by paragraphs (l) and (m) of this AD, no person may install a DSC228 series barrel nut at the horizontal-stabilizer-to-vertical-stabilizer attachment joint on the modified airplane. (o) Terminating Actions Accomplishment of the actions required by paragraphs (l) and (m) of this AD, as applicable, terminates the requirements of paragraphs (h), (i), and (j) of this AD. (p) Credit for Previous Actions (1) This paragraph provides credit for actions required by paragraphs (g)(1), (g)(2), (h)(1), (h)(1)(i), (h)(1)(ii), (h)(2), (h)(3), (h)(4), (i), and (k) of this AD, if those actions were performed before the effective date of this AD using the service information identified in paragraphs (p)(1)(i) through (p)(1)(iii) of this AD. (i) Bombardier Alert Service Bulletin A84-55-04, dated May 21, 2015, which is not incorporated by reference in this AD. (ii) Bombardier Alert Service Bulletin A84-55-04, Revision A, dated June 2, 2015, which is not incorporated by reference in this AD. (iii) Bombardier Alert Service Bulletin A84-55-04, Revision B, dated July 30, 2015, which is not incorporated by reference in this AD. (2) This paragraph provides credit for actions required by paragraphs (h)(1), (h)(1)(i), (h)(1)(ii), (h)(2), and (k) of this AD, if those actions were performed before the effective date of this AD using the service information identified in paragraphs (p)(2)(i) and (p)(2)(ii) of this AD. (i) Bombardier Service Bulletin 84-55-08, dated January 27, 2017, which is not incorporated by reference in this AD. (ii) Bombardier Alert Service Bulletin A84-55-04, Revision C, dated May 3, 2016, which was incorporated by reference in AD 2016- 24-03. (q) Other FAA AD Provisions (1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. (i) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (ii) AMOCs approved previously for AD 2016-24-03 are approved as AMOCs for the corresponding provisions of this AD. (2) Contacting the Manufacturer: For any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (r) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) TCCA Airworthiness Directive CF-2015-13R1, dated June 26, 2017, for related information. This MCAI may be found in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-0160. (2) For more information about this AD, contact Aziz Ahmed, Aerospace Engineer, Airframe and Mechanical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7329; fax 516-794-5531. (3) For service information identified in this AD, contact Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000; fax 416-375-4539; email [email protected]; internet http://www.bombardier.com. You may view this service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. Issued in Renton, Washington, on March 2, 2018. Michael Kaszycki, Acting Director, System Oversight Division, Aircraft Certification Service. [FR Doc. 2018-04720 Filed 3-8-18; 8:45 am] BILLING CODE 4910-13-P
![10408 Federal Register / Vol. 83, No. 47 / Friday, March 9, 2018 / Proposed Rules
DEPARTMENT OF TRANSPORTATION Examining the AD Docket stabilizer attachment joints and lead to
You may examine the AD docket on loss of control of the airplane.
Federal Aviation Administration the internet at http:// Actions Since AD 2016–24–03 Was
www.regulations.gov by searching for Issued
14 CFR Part 39
and locating Docket No. FAA–2018–
Since we issued AD 2016–24–03,
[Docket No. FAA–2018–0160; Product 0160; or in person at the Docket
Identifier 2017–NM–139–AD] Bombardier, Inc. has issued new service
Management Facility between 9 a.m.
information that describes a
RIN 2120–AA64 and 5 p.m., Monday through Friday,
modification. We have determined that
except Federal holidays. The AD docket
accomplishment of this modification
Airworthiness Directives; Bombardier, contains this proposed AD, the
will address the unsafe condition and
Inc., Airplanes regulatory evaluation, any comments
terminate the repetitive inspections
received, and other information. The
AGENCY: Federal Aviation required by AD 2016–24–03. This
street address for the Docket Operations
Administration (FAA), DOT. modification was applied to certain
office (telephone 800–647–5527) is in
ACTION: Notice of proposed rulemaking airplanes in production.
the ADDRESSES section. Comments will Transport Canada Civil Aviation
(NPRM). be available in the AD docket shortly (TCCA), which is the aviation authority
SUMMARY: We propose to supersede after receipt. for Canada, has issued Canadian
Airworthiness Directive (AD) 2016–24– FOR FURTHER INFORMATION CONTACT: Aziz Airworthiness Directive CF–2015–13R1,
03, which applies to certain Ahmed, Aerospace Engineer, Airframe dated June 26, 2017 (referred to after
Bombardier, Inc., Model DHC–8–400 and Mechanical Systems Section, FAA, this as the Mandatory Continuing
series airplanes. AD 2016–24–03 New York ACO Branch, 1600 Stewart Airworthiness Information, or ‘‘the
requires repetitive detailed inspections Avenue, Suite 410, Westbury, NY MCAI’’), to correct an unsafe condition
of barrel nuts and cradles, a check of the 11590; telephone 516–228–7329; fax for certain Bombardier, Inc., Model
bolt torque of the preload indicating 516–794–5531. DHC–8–400 series airplanes. The MCAI
(PLI) washers, and corrective actions if SUPPLEMENTARY INFORMATION: states:
necessary. Since we issued AD 2016–
24–03, the manufacturer has developed Comments Invited There has been one in-service report of a
cracked and corroded barrel nut, part number
a modification that, when incorporated, We invite you to send any written (P/N) DSC228–12, found at the mid-spar
terminates the repetitive inspections. relevant data, views, or arguments about location of the horizontal stabilizer to vertical
This proposed AD would require this proposed AD. Send your comments stabilizer attachment joint. There have also
modifying the airplane by installing a to an address listed under the been two other reports of corroded barrel
sealing disk to a certain location and ADDRESSES section. Include ‘‘Docket No. nuts found at mid-spar locations.
replacing certain barrel nuts. We are FAA–2018–0160; Product Identifier Preliminary investigation determined that
proposing this AD to address the unsafe 2017–NM–139–AD’’ at the beginning of the cracking is initiated by corrosion. Further
condition on these products. your comments. We specifically invite investigation confirmed that the corrosion
comments on the overall regulatory, was caused by inadequate cadmium plating
DATES: We must receive comments on
on the barrel nuts. Failure of the barrel nuts
this proposed AD by April 23, 2018. economic, environmental, and energy could compromise the structural integrity of
ADDRESSES: You may send comments, aspects of this proposed AD. We will the joint and could lead to loss of control of
using the procedures found in 14 CFR consider all comments received by the the aeroplane.
11.43 and 11.45, by any of the following closing date and may amend this The original version of this [Canadian] AD
methods: proposed AD based on those comments. was issued to mandate the initial and
• Federal eRulemaking Portal: Go to We will post all comments we repetitive inspections of the barrel nuts [and
http://www.regulations.gov. Follow the receive, without change, to http:// cradles for cracks and corrosion] at each of
instructions for submitting comments. www.regulations.gov, including any the horizontal stabilizer to vertical stabilizer
attachment joints.
• Fax: 202–493–2251. personal information you provide. We
Revision 1 of this [Canadian] AD is issued
• Mail: U.S. Department of will also post a report summarizing each
to terminate the repetitive inspection
Transportation, Docket Operations, substantive verbal contact we receive requirement by requiring the incorporation of
M–30, West Building Ground Floor, about this proposed AD. a modification to install a sealing disc at the
Room W12–140, 1200 New Jersey middle spar location of the horizontal
Discussion
Avenue SE, Washington, DC 20590. stabilizer to vertical stabilizer attachment
• Hand Delivery: Deliver to Mail We issued AD 2016–24–03, joint, and the replacement of the DSC228
address above between 9 a.m. and 5 Amendment 39–18720 (81 FR 88623, series barrel nuts with B0203073 series barrel
p.m., Monday through Friday, except December 8, 2016) (‘‘AD 2016–24–03’’), nuts that are more resistant to corrosion. The
Federal holidays. for certain Bombardier, Inc., Model applicability has been changed to account for
For service information identified in DHC–8–400 series airplanes. AD 2016– the introduction of the modifications in
this NPRM, contact Bombardier, Inc., 24–03 requires repetitive detailed production.
Q-Series Technical Help Desk, 123 inspections of barrel nuts and cradles, a Required actions include a bolt
Garratt Boulevard, Toronto, Ontario check of the bolt torque of the PLI preload check of the PLI washers and
M3K 1Y5, Canada; telephone 416–375– washers, and corrective action if applicable corrective actions (retorque
4000; fax 416–375–4539; email necessary. AD 2016–24–03 resulted of the bolts and replacement of the
amozie on DSK30RV082PROD with PROPOSALS
thd.qseries@aero.bombardier.com; from reports of cracked and corroded barrel nut), a detailed inspection of
internet http://www.bombardier.com. barrel nuts found at the mid-spar cracked or broken barrel nuts for
You may view this referenced service location of the horizontal-stabilizer-to- damaged bores of the fittings,
information at the FAA, Transport vertical-stabilizer attachment joint. We replacement of discrepant barrel nuts
Standards Branch, 2200 South 216th St., issued AD 2016–24–03 to detect and (those with signs of structural damaged,
Des Moines, WA. For information on the correct cracked and corroded barrel corrosion, or cracking, or having a part
availability of this material at the FAA, nuts, which could compromise the number other than B0203073 series),
call 206–231–3195. structural integrity of the vertical- adding an aluminum sealing disk to the
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![Federal Register / Vol. 83, No. 47 / Friday, March 9, 2018 / Proposed Rules 10409
mid-spar barrel nut bore, and repair of • Bombardier Service Bulletin 84–55– AD because we evaluated all pertinent
damage and corrosion. 06, dated January 31, 2017. The service information and determined an unsafe
You may examine the MCAI in the information describes procedures for condition exists and is likely to exist or
AD docket on the internet at http:// installing an aluminum sealing disk at develop on other products of the same
www.regulations.gov by searching for the mid-spar location of the vertical type design.
and locating Docket No. FAA–2018– stabilizer.
0160. • Bombardier Service Bulletin 84–55– Differences Between This Proposed AD
08, Revision A, dated August 2, 2017. and the MCAI or Service Information
Explanation of Changes From AD 2016–
24–03 The service information describes The applicability of Canadian AD CF–
procedures for an inspection for part 2015–13R1, dated June 26, 2017, is
In paragraph (h)(2) of AD 2016–24–03,
number and damage of the barrel nuts limited to Bombardier, Inc., Model
we stated ‘‘. . . replace the barrel nut
at the horizontal-to-vertical-stabilizer DHC–8–400, –401 and –402 airplanes,
accomplish corrective actions in
attachment joints, and replacement of serial numbers 4001 through 4547.
accordance with [methods approved by
discrepant parts.
the FAA, TCCA, or Bombardier’s TCCA However, the applicability of this
Design Approval Organization].’’ We This service information is reasonably proposed AD includes Bombardier, Inc.,
intended to match the language in the available because the interested parties Model DHC–8–400, –401 and –402
MCAI and allow operators to either have access to it through their normal airplanes, serial numbers 4001 and
replace the discrepant barrel nut in course of business or by the means
subsequent. Because the affected barrel
accordance with the applicable service identified in the ADDRESSES section.
nuts are rotable parts, we have
information or to request an alternative FAA’s Determination and Requirements determined that discrepant parts could
method of compliance (AMOC). In of This Proposed AD later be installed on airplanes that were
addition, we left ‘‘paragraph (h)(2)’’ out initially delivered with B0203073 series
of the credit paragraph in AD 2016–24– This product has been approved by
the aviation authority of another barrel nuts, thereby subjecting those
03. We have updated the retained airplanes to the unsafe condition.
requirements in this proposed AD to country, and is approved for operation
correct those errors. in the United States. Pursuant to our Costs of Compliance
bilateral agreement with the State of
Related Service Information Under 1 Design Authority, we have been notified We estimate that this proposed AD
CFR Part 51 of the unsafe condition described in the affects 54 airplanes of U.S. registry. We
Bombardier, Inc. has issued the MCAI and service information estimate the following costs to comply
following service information. referenced above. We are proposing this with this proposed AD:
ESTIMATED COSTS
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
Inspections (retained actions from AD 2016– 8 work-hours × $85 per hour = $680 ............. $0 $680 $36,720
24–03).
Sealing disk installation (new proposed ac- 4 work-hours × $85 per hour = $340 ............. 781 1,121 60,534
tion).
Replacement of DSC228 series barrel nuts 2 work-hours × $85 per hour = $170 ............. 2,236 2,406 129,924
(new proposed action).
We estimate the following costs to do be required based on the results of the determining the number of aircraft that
any necessary replacements that would inspection. We have no way of might need these replacements:
ON-CONDITION COSTS
Cost per
Action Labor cost Parts cost product
Replacement (retained action from AD 2016–24–03) 2 work-hours × $85 per hour = $170 ........................... $8,881 $9,051
We have received no definitive data detail the scope of the Agency’s because it addresses an unsafe condition
that would enable us to provide cost authority. that is likely to exist or develop on
estimates for the on-condition actions We are issuing this rulemaking under products identified in this rulemaking
specified in this proposed AD. the authority described in ‘‘Subtitle VII, action.
Authority for This Rulemaking Part A, Subpart III, Section 44701: This AD is issued in accordance with
amozie on DSK30RV082PROD with PROPOSALS
General requirements.’’ Under that authority delegated by the Executive
Title 49 of the United States Code section, Congress charges the FAA with Director, Aircraft Certification Service,
specifies the FAA’s authority to issue promoting safe flight of civil aircraft in as authorized by FAA Order 8000.51C.
rules on aviation safety. Subtitle I, air commerce by prescribing regulations In accordance with that order, issuance
section 106, describes the authority of for practices, methods, and procedures of ADs is normally a function of the
the FAA Administrator. ‘‘Subtitle VII: the Administrator finds necessary for Compliance and Airworthiness
Aviation Programs,’’ describes in more safety in air commerce. This regulation Division, but during this transition
is within the scope of that authority period, the Executive Director has
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![10410 Federal Register / Vol. 83, No. 47 / Friday, March 9, 2018 / Proposed Rules
delegated the authority to issue ADs certificated in any category, serial numbers do the applicable actions in paragraphs
applicable to transport category 4001 and subsequent. (h)(1), (h)(2), (h)(3), and (h)(4) of this AD.
airplanes to the Director of the System Accomplishment of the actions required by
(d) Subject paragraphs (l) and (m) of this AD, as
Oversight Division. Air Transport Association (ATA) of applicable, terminates the requirements of
Regulatory Findings America Code 55, Stabilizers. this paragraph.
(1) If any barrel nut or cradle is found
We determined that this proposed AD (e) Reason
cracked or broken, before further flight,
would not have federalism implications This AD was prompted by reports of replace the barrel nut and associated
under Executive Order 13132. This cracked and corroded barrel nuts found at the hardware, in accordance with paragraph 3.B.,
proposed AD would not have a mid-spar location of the horizontal-stabilizer- ‘‘Procedure,’’ of the Accomplishment
substantial direct effect on the States, on to-vertical-stabilizer attachment joint, and the Instructions of Bombardier Service Bulletin
issuance of new service information that 84–55–08, Revision A, dated August 2, 2017.
the relationship between the national
includes a terminal modification. We are (i) Concurrently with the replacement of
Government and the States, or on the issuing this AD to detect and correct cracked any barrel nut, do a detailed inspection for
distribution of power and and corroded barrel nuts, which could corrosion and damage of the bore of the
responsibilities among the various compromise the structural integrity of the fitting, in accordance with paragraph 3.B.,
levels of government. vertical-stabilizer attachment joints and lead ‘‘Procedure,’’ of the Accomplishment
For the reasons discussed above, I to loss of control of the airplane. Instructions of Bombardier Service Bulletin
certify this proposed regulation: (f) Compliance 84–55–08, Revision A, dated August 2, 2017,
1. Is not a ‘‘significant regulatory and, before further flight, repair all corrosion
action’’ under Executive Order 12866; Comply with this AD within the and damage, in accordance with Bombardier
compliance times specified, unless already
2. Is not a ‘‘significant rule’’ under the Repair Drawing (RD) 8/4–55–1143, Issue 1,
done. dated May 21, 2015. If the bore of the fitting
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); (g) Retained Detailed Inspection of Barrel cannot be repaired in accordance with
3. Will not affect intrastate aviation in Nuts for Cracks and Corrosion, With No Bombardier RD 8/4–55–1143, Issue 1, dated
Alaska; and Changes May 21, 2015, accomplish corrective actions
in accordance with the procedures specified
4. Will not have a significant This paragraph restates the requirements of
paragraphs (g)(1) and (g)(2) of AD 2016–24– in paragraph (q)(2) of this AD.
economic impact, positive or negative, (ii) Within 600 flight hours or 4 months,
on a substantial number of small entities 03, with no changes.
(1) For airplanes that have accumulated whichever occurs first, after the replacement
under the criteria of the Regulatory of a cracked barrel nut, replace the remaining
5,400 flight hours or more, or have been in
Flexibility Act. service 32 months or more since the date of barrel nuts and their associated hardware at
issuance of the original certificate of the horizontal-stabilizer-to-vertical-stabilizer
List of Subjects in 14 CFR Part 39 attachment joints, in accordance with
airworthiness or the date of issuance of the
Air transportation, Aircraft, Aviation original export certificate of airworthiness, as paragraph 3.B., ‘‘Procedure,’’ of the
safety, Incorporation by reference, of January 12, 2017 (the effective date of AD Accomplishment Instructions of Bombardier
Safety. 2016–24–03): Within 600 flight hours or 4 Service Bulletin 84–55–08, Revision A, dated
months, whichever occurs first after January August 2, 2017.
The Proposed Amendment 12, 2017, do a detailed visual inspection for (2) If any corrosion is found on any barrel
Accordingly, under the authority signs of cracks and corrosion of the barrel nut nut on the front or rear-spar joints, before
and cradle, in accordance with paragraph further flight, replace the barrel nut in
delegated to me by the Administrator, accordance with paragraph 3.B.,
the FAA proposes to amend 14 CFR part 3.B., ‘‘Procedure,’’ of the Accomplishment
Instructions of Bombardier Alert Service ‘‘Procedure,’’ of the Accomplishment
39 as follows: Instructions of Bombardier Service Bulletin
Bulletin A84–55–04, Revision C, dated May
3, 2016. 84–55–08, Revision A, dated August 2, 2017,
PART 39—AIRWORTHINESS (2) For airplanes that have less than 5,400 or accomplish corrective actions in
DIRECTIVES flight hours, and have been in-service for less accordance with the procedures specified in
than 32 months since the date of issuance of paragraph (q)(2) of this AD.
■ 1. The authority citation for part 39 the original certificate of airworthiness or the (3) If any corrosion above level 1, as
continues to read as follows: date of issuance of the original export defined in Bombardier Alert Service Bulletin
Authority: 49 U.S.C. 106(g), 40113, 44701. certificate of airworthiness, as of January 12, A84–55–04, Revision C, dated May 3, 2016,
2017: Before the accumulation of 6,000 total is found on a barrel nut at the mid-spar joint,
§ 39.13 [Amended] flight hours or 36 months since the date of before further flight, replace the barrel nut
■ 2. The FAA amends § 39.13 by issuance of the original certificate of and accomplish corrective actions in
airworthiness or the date of issuance of the accordance with the procedures specified in
removing Airworthiness Directive (AD)
original export certificate of airworthiness, paragraph (q)(2) of this AD.
2016–24–03, Amendment 39–18720 (81 (4) If all corrosion found is at level 1 or
whichever occurs first, do a detailed visual
FR 88623, December 8, 2016), and inspection of the barrel nut for signs of cracks below, as defined in Bombardier Alert
adding the following new AD: and corrosion of the barrel nut and cradle, in Service Bulletin A84–55–04, Revision C,
Bombardier, Inc.: Docket No. FAA–2018– accordance with paragraph 3.B., dated May 3, 2016, on a barrel nut at the mid-
0160; Product Identifier 2017–NM–139– ‘‘Procedure,’’ of the Accomplishment spar joint, repeat the inspection specified in
AD. Instructions of Bombardier Alert Service paragraph (g) of this AD at intervals not to
Bulletin A84–55–04, Revision C, dated May exceed 600 flight hours or 4 months,
(a) Comments Due Date 3, 2016. whichever occurs first, until completion of
We must receive comments by April 23, the actions required by paragraph (k) of this
(h) Retained Corrective Actions, Detailed AD.
2018. Inspection, and Repetitive Inspections, With
amozie on DSK30RV082PROD with PROPOSALS
(b) Affected ADs New Service Information, Reference to (i) Retained Preload Indicating (PLI) Washer
Terminating Action, and Reference to Check, With New Terminating Action
This AD replaces AD 2016–24–03,
Corrective Actions This paragraph restates the requirements of
Amendment 39–18720 (81 FR 88623,
December 8, 2016) (‘‘AD 2016–24–03’’). This paragraph restates the requirements of paragraph (i) of AD 2016–24–03, with new
paragraph (h) of AD 2016–24–03, with new terminating action. For airplanes with PLI
(c) Applicability service information and terminating action. washers installed at the front and rear-spar
This AD applies to Bombardier, Inc., Depending on the findings of any inspection joints, before further flight after
Model DHC–8–400, –401 and –402 airplanes, required by paragraphs (g) and (j) of this AD, accomplishing any inspection required by
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![Federal Register / Vol. 83, No. 47 / Friday, March 9, 2018 / Proposed Rules 10411
paragraph (g) of this AD and all applicable applicable, terminates the requirements of actions from a manufacturer, the action must
corrective actions required by paragraph (h) paragraphs (h), (i), and (j) of this AD. be accomplished using a method approved
of this AD, check the bolt preload, and do all by the Manager, New York ACO Branch,
(n) Parts Installation Prohibition FAA; or Transport Canada Civil Aviation
applicable corrective actions, in accordance
with paragraph 3.B., ‘‘Procedure,’’ of the After modification of an airplane as (TCCA); or Bombardier, Inc.’s TCCA Design
Accomplishment Instructions of Bombardier required by paragraphs (l) and (m) of this AD, Approval Organization (DAO). If approved by
Alert Service Bulletin A84–55–04, Revision no person may install a DSC228 series barrel the DAO, the approval must include the
C, dated May 3, 2016. Do all applicable nut at the horizontal-stabilizer-to-vertical- DAO-authorized signature.
corrective actions before further flight. stabilizer attachment joint on the modified
airplane. (r) Related Information
Accomplishment of the actions required by
paragraphs (l) and (m) of this AD, as (1) Refer to Mandatory Continuing
(o) Terminating Actions Airworthiness Information (MCAI) TCCA
applicable, terminates the requirements of
Accomplishment of the actions required by Airworthiness Directive CF–2015–13R1,
this paragraph.
paragraphs (l) and (m) of this AD, as dated June 26, 2017, for related information.
(j) Retained Repetitive Inspection Interval, applicable, terminates the requirements of This MCAI may be found in the AD docket
With New Terminating Action paragraphs (h), (i), and (j) of this AD. on the internet at http://www.regulations.gov
This paragraph restates the requirements of (p) Credit for Previous Actions by searching for and locating Docket No.
paragraph (j) of AD 2016–24–03, with new FAA–2018–0160.
(1) This paragraph provides credit for (2) For more information about this AD,
terminating action. Repeat the inspection and actions required by paragraphs (g)(1), (g)(2),
preload check required by paragraphs (g) and contact Aziz Ahmed, Aerospace Engineer,
(h)(1), (h)(1)(i), (h)(1)(ii), (h)(2), (h)(3), (h)(4), Airframe and Mechanical Systems Section,
(i) of this AD at intervals not to exceed 3,600 (i), and (k) of this AD, if those actions were
flight hours or 18 months, whichever occurs FAA, New York ACO Branch, 1600 Stewart
performed before the effective date of this AD Avenue, Suite 410, Westbury, NY 11590;
first, except as provided by paragraph (k) of using the service information identified in
this AD. Accomplishment of the actions telephone 516–228–7329; fax 516–794–5531.
paragraphs (p)(1)(i) through (p)(1)(iii) of this (3) For service information identified in
required by paragraphs (l) and (m) of this AD, AD.
as applicable, terminates the requirements of this AD, contact Bombardier, Inc., Q-Series
(i) Bombardier Alert Service Bulletin A84– Technical Help Desk, 123 Garratt Boulevard,
this paragraph. 55–04, dated May 21, 2015, which is not Toronto, Ontario M3K 1Y5, Canada;
(k) Retained Optional Barrel Nut incorporated by reference in this AD. telephone 416–375–4000; fax 416–375–4539;
Replacement, With New Service Information (ii) Bombardier Alert Service Bulletin A84– email thd.qseries@aero.bombardier.com;
55–04, Revision A, dated June 2, 2015, which internet http://www.bombardier.com. You
This paragraph restates the provisions of is not incorporated by reference in this AD.
paragraph (k) of AD 2016–24–03, with new may view this service information at the
(iii) Bombardier Alert Service Bulletin FAA, Transport Standards Branch, 2200
service information. Inspection and A84–55–04, Revision B, dated July 30, 2015,
replacement of all barrel nuts at the South 216th St., Des Moines, WA. For
which is not incorporated by reference in this information on the availability of this
horizontal-stabilizer-to-vertical-stabilizer AD.
attachment joints, in accordance with material at the FAA, call 206–231–3195.
(2) This paragraph provides credit for
paragraph 3.B., ‘‘Procedure,’’ of the actions required by paragraphs (h)(1), Issued in Renton, Washington, on March 2,
Accomplishment Instructions of Bombardier (h)(1)(i), (h)(1)(ii), (h)(2), and (k) of this AD, 2018.
Service Bulletin 84–55–08, Revision A, dated if those actions were performed before the Michael Kaszycki,
August 2, 2017, extends the next inspection effective date of this AD using the service
required by paragraph (j) of this AD to within Acting Director, System Oversight Division,
information identified in paragraphs (p)(2)(i) Aircraft Certification Service.
6,000 flight hours or 36 months, whichever and (p)(2)(ii) of this AD.
occurs first, after accomplishing the (i) Bombardier Service Bulletin 84–55–08, [FR Doc. 2018–04720 Filed 3–8–18; 8:45 am]
replacement. dated January 27, 2017, which is not BILLING CODE 4910–13–P
(l) New Requirement of This AD: Sealing incorporated by reference in this AD.
Disk Installation (ii) Bombardier Alert Service Bulletin A84–
55–04, Revision C, dated May 3, 2016, which DEPARTMENT OF TRANSPORTATION
Within 8,000 flight hours or 48 months, was incorporated by reference in AD 2016–
whichever occurs first, after the effective date 24–03. Federal Aviation Administration
of this AD, install a sealing disk at the mid-
spar location of the vertical stabilizer in (q) Other FAA AD Provisions
accordance with paragraph 3.B., 14 CFR Part 39
(1) Alternative Methods of Compliance
‘‘Procedure,’’ of the Accomplishment (AMOCs): The Manager, New York ACO [Docket No. FAA–2018–0165; Product
Instructions of Bombardier Service Bulletin Branch, FAA, has the authority to approve Identifier 2017–NM–122–AD]
84–55–06, dated January 31, 2017. AMOCs for this AD, if requested using the
Accomplishment of the actions required by procedures found in 14 CFR 39.19. In RIN 2120–AA64
paragraphs (l) and (m) of this AD, as accordance with 14 CFR 39.19, send your
applicable, terminates the requirements of request to your principal inspector or local Airworthiness Directives; Airbus
paragraphs (h), (i), and (j) of this AD. Flight Standards District Office, as Airplanes
appropriate. If sending information directly
(m) New Requirement of This AD:
to the manager of the certification office, AGENCY: Federal Aviation
Replacement of DSC228 Series Barrel Nuts send it to ATTN: Program Manager, Administration (FAA), DOT.
For Bombardier, Inc., Model DHC–8–400, Continuing Operational Safety, FAA, New ACTION: Notice of proposed rulemaking
–401 and –402 airplanes, serial numbers York ACO Branch, 1600 Stewart Avenue, (NPRM).
4001 through 4524 inclusive: Within 8,000 Suite 410, Westbury, NY 11590; telephone
flight hours or 48 months, whichever occurs 516–228–7300; fax 516–794–5531. SUMMARY: We propose to adopt a new
first, after the effective date of this AD, (i) Before using any approved AMOC, airworthiness directive (AD) for all
replace all DSC228 series barrel nuts at the notify your appropriate principal inspector,
amozie on DSK30RV082PROD with PROPOSALS
Airbus Model A318–111 and –112
horizontal-stabilizer-to-vertical-stabilizer or lacking a principal inspector, the manager airplanes, Model A319–111, –112, –113,
attachment joints with B0203073 series barrel of the local flight standards district office/ –114, and –115 airplanes, Model A320–
nuts in accordance with paragraph 3.B., certificate holding district office.
‘‘Procedure,’’ of the Accomplishment (ii) AMOCs approved previously for AD 211, –212, –214, and –216 airplanes,
Instructions of Bombardier Service Bulletin 2016–24–03 are approved as AMOCs for the and Model A321–111, –112, –211, –212,
84–55–08, Revision A, dated August 2, 2017. corresponding provisions of this AD. and –213 airplanes. This proposed AD
Accomplishment of the actions required by (2) Contacting the Manufacturer: For any was prompted by a report of a
paragraphs (l) and (m) of this AD, as requirement in this AD to obtain corrective production quality deficiency on the
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Document Created: 2018-03-09 03:48:16
Document Modified: 2018-03-09 03:48:16
| Category | Regulatory Information | |
| Collection | Federal Register | |
| sudoc Class | AE 2.7: GS 4.107: AE 2.106: | |
| Publisher | Office of the Federal Register, National Archives and Records Administration | |
| Section | Proposed Rules | |
| Action | Notice of proposed rulemaking (NPRM). | |
| Dates | We must receive comments on this proposed AD by April 23, 2018. | |
| Contact | Aziz Ahmed, Aerospace Engineer, Airframe and Mechanical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7329; fax 516-794-5531. | |
| FR Citation | 83 FR 10408 | |
| RIN Number | 2120-AA64 | |
| CFR Associated | Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety |
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