82 FR 28028 - Airworthiness Directives; Honeywell International Inc. Turbofan Engines
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration Federal Register Volume 82, Issue 117 (June 20, 2017)
Federal Aviation Administration
Federal Register Volume 82, Issue 117 (June 20, 2017)
| Page Range | 28028-28030 | |
| FR Document | 2017-12561 |
[Federal Register Volume 82, Number 117 (Tuesday, June 20, 2017)] [Proposed Rules] [Pages 28028-28030] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2017-12561] ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2017-0034; Directorate Identifier 2016-NE-32-AD] RIN 2120-AA64 Airworthiness Directives; Honeywell International Inc. Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). ----------------------------------------------------------------------- SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Honeywell International Inc. (Honeywell) AS907-1-1A turbofan engines. This proposed AD was prompted by reports of loss of power due to failure of the second stage low-pressure turbine (LPT2) blade. This proposed AD would require a one-time inspection of the LPT2 blades and, if the blades fail the inspection, the replacement of the blades with a part eligible for installation. We are proposing this AD to correct the unsafe condition on these products. DATES: We must receive comments on this proposed AD by August 4, 2017. 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 Honeywell International Inc., 111 S 34th Street, Phoenix, AZ 85034-2802; phone: 800-601-3099; Internet: https://myaerospace.honeywell.com/wps/portal/!ut/. You may view this service information at the FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. For information on the availability of this material at the FAA, call 781- 238-7125. 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-2017- 0034; 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 Office (phone: 800-647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Joseph Costa, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; phone: 562- 627-5246; fax: 562-627-5210; email: [email protected]. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ``Docket No. FAA-2017-0034; Directorate Identifier 2016-NE-32-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 because of 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 received reports of a loss of power due to failure of the LPT2 blade from high-cycle fatigue in the blade's dovetail region at similar times-in-service. The probable cause of this failure is wear and fretting of the LPT2 blade Z gap contact area at the blade tip shroud that leads to loss of dampening and increased vibration of the LPT2 blade. This tip shroud condition in two new production engines with the same time-in-service, if not corrected, could result in failure of the LPT2 blades, failure of one or more engines, and loss of the airplane. Related Service Information Under 1 CFR Part 51 We reviewed Honeywell Service Bulletin (SB) AS907-72-9067, Revision [[Page 28029]] 1, dated March 20, 2017. This SB describes procedures for inspecting the LPT2 blades. 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. Other Related Service Information We reviewed Honeywell SB AS907-72-9067, Revision 0, dated December 12, 2016, which also describe procedures for inspecting the LPT2 blades. We also reviewed the Honeywell Light Maintenance Manual, AS907- 1-1A, 72-00-00, Section 72-05-12, dated May 25, 2016, and Section 72- 55-03, dated September 27, 2011, which provide additional guidance for performing borescope inspections. FAA's Determination We are proposing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Proposed AD Requirements This proposed AD would require a one-time borescope inspection of the LPT2 blades and, if the blades fail the inspection, replacement of the blades with an LPT2 rotor assembly eligible for installation. Differences Between This Proposed AD and the Service Information Honeywell SB AS907-72-9067, Revision 1, dated March 20, 2017, recommends borescope inspections of the affected LPT2 blades with more than 8,000 hours-since-new (HSN) and recommends that these inspections be completed within 400 operating hours after the issuance of Honeywell SB AS907-72-9067, Revision 0, dated December 12, 2016. This NPRM would require inspections of affected LPT2 blades with more than 8,000 HSN and requires that these inspections be completed within 200 operating hours after the effective date of this AD. This NPRM includes a reporting requirement that Honeywell SB AS907-72-9067, Revision 1, dated March 20, 2017 does not. Costs of Compliance We estimate that this proposed AD affects 40 engines installed on 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 ---------------------------------------------------------------------------------------------------------------- Borescope inspection............... 10 work-hours x $85 per $0 $850 $34,000 hour = $850. Report results of inspection....... 1 work-hour x $85 per hour 0 85 3,400 = 85. ---------------------------------------------------------------------------------------------------------------- We estimate the following costs to do any necessary replacements that would be required based on the results of the proposed inspection. We estimate that 40 engines will need this replacement. On-Condition Costs ---------------------------------------------------------------------------------------------------------------- Cost per Action Labor cost Parts cost product ---------------------------------------------------------------------------------------------------------------- Replacement of the LPT2 blade set......... 50 work-hours x $85 per hour = $50,000 $54,250 $4,250. ---------------------------------------------------------------------------------------------------------------- Paperwork Reduction Act A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB control number. The control number for the collection of information required by this AD is 2120- 0056. The paperwork cost associated with this AD has been detailed in the Costs of Compliance section of this document and includes time for reviewing instructions, as well as completing and reviewing the collection of information. Therefore, all reporting associated with this AD is mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at 800 Independence Ave. SW., Washington, DC 20591. ATTN: Information Collection Clearance Officer, AES-200. 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. 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 to the extent that it justifies making a regulatory distinction, and [[Page 28030]] (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 adding the following new airworthiness directive (AD): Honeywell International Inc.: Docket No. FAA-2017-0034; Directorate Identifier 2016-NE-32-AD. (a) Comments Due Date We must receive comments by August 4, 2017. (b) Affected ADs None. (c) Applicability This AD applies to Honeywell International Inc. (Honeywell) AS907-1-1A turbofan engines with second stage low-pressure turbine (LPT2) rotor blades, part number (P/N) 3035602-1, installed. (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by reports of loss of power due to failure of the LPT2 blade. We are issuing this AD to prevent failure of the LPT2 blades, failure of one or more engines, and loss of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (1) For LPT2 rotor blades, P/N 3035602-1 that have more than 8,000 hours since new on the effective date of this AD, perform a one-time borescope inspection for wear of the Z gap contact area at the blade tip shroud for each of the 62 LPT2 rotor blades within 200 hours time in service after the effective date of this AD. (2) Use the Accomplishment Instructions, Paragraph 3.B.(1), of Honeywell Service Bulletin (SB) AS907-72-9067, Revision 1, dated March 20, 2017, to do the inspection. (3) If the measured wear and/or fretting of any Z gap contact area is greater than 0.005 inch, replace the LPT2 rotor assembly with a part eligible for installation before further flight. (4) Do the following actions within 200 hours time in service after the effective date of this AD: (i) Using a borescope make a clear digital image of the Z gap contact area at the blade tip shroud of the 62 LPT2 rotor blades. (ii) Identify the three Z gap contact areas with the greatest amount of wear and/or fretting. (iii) Record the blade position on the LPT2 rotor assembly and the measured wear of the three Z gap contact areas with the greatest amount of wear and/or fretting. (iv) Send the results to Honeywell at [email protected] within 30 days after completing these actions. (g) Credit for Previous Actions You may take credit for the actions required by paragraphs (f)(1) and (4) of this AD, if you performed these actions before the effective date of this AD using Honeywell SB AS907-72-9067, Revision 0, dated December 12, 2016. (h) Paperwork Reduction Act Burden Statement A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 2120-0056. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave. SW., Washington, DC 20591, Attn: Information Collection Clearance Officer, AES-200. (i) Alternative Methods of Compliance (AMOCs) The Manager, Los Angeles Aircraft Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. (j) Related Information (1) For more information about this proposed AD, contact Joseph Costa, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; phone: 562-627-5246; fax: 562-627-5210; email: [email protected]. (2) Honeywell SBs AS907-72-9067, Revision 0, dated December 12, 2016 and AS907-72-9067, Revision 1, dated March 20, 2017, can be obtained from Honeywell International Inc., using the contact information in paragraph (j)(3) of this proposed AD. (3) For service information identified in this proposed AD, contact Honeywell International Inc., 111 S 34th Street, Phoenix, AZ 85034-2802; phone: 800-601-3099; Internet: https://myaerospace.honeywell.com/wps/portal/!ut/. (4) You may view this service information at the FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. For information on the availability of this material at the FAA, call 781-238-7125. Issued in Burlington, Massachusetts, on June 13, 2017. Robert J. Ganley, Acting Manager, Engine & Propeller Directorate, Aircraft Certification Service. [FR Doc. 2017-12561 Filed 6-19-17; 8:45 am] BILLING CODE 4910-13-P
![28028 Federal Register / Vol. 82, No. 117 / Tuesday, June 20, 2017 / Proposed Rules
Mandatory Service Bulletin SB 29–4161, DEPARTMENT OF TRANSPORTATION and locating Docket No. FAA–2017–
dated November 18, 2016. Use table 1 in 0034; or in person at the Docket
Parker Service Bulletin 66179–29–486, dated Federal Aviation Administration Management Facility between 9 a.m.
August 4, 2016, to identify the affected serial and 5 p.m., Monday through Friday,
numbers of EDP, P/N 66179–01 (Beechcraft/ 14 CFR Part 39 except Federal holidays. The AD docket
Textron P/N 390–389022–0003). contains this proposed AD, the
(h) Replacement [Docket No. FAA–2017–0034; Directorate
Identifier 2016–NE–32–AD] regulatory evaluation, any comments
If any affected serial number EDP was received, and other information. The
found during the inspection required in RIN 2120–AA64 street address for the Docket Office
paragraph (g) of this AD, within 100 hours
(phone: 800–647–5527) is in the
TIS after the effective date of this AD, replace Airworthiness Directives; Honeywell
ADDRESSES section. Comments will be
any affected serial number EDP, P/N 66179– International Inc. Turbofan Engines
01 (Beechcraft/Textron P/N 390–389022– available in the AD docket shortly after
0003), with a serviceable serial number EDP, AGENCY: Federal Aviation receipt.
P/N 66179–01 (Beechcraft/Textron P/N 390– Administration (FAA), DOT. FOR FURTHER INFORMATION CONTACT:
389022–0003) that is either not listed in table ACTION: Notice of proposed rulemaking Joseph Costa, Aerospace Engineer, Los
1 in Parker Service Bulletin 66179–29–486, (NPRM). Angeles Aircraft Certification Office,
dated August 4, 2016, or has been reworked FAA, Transport Airplane Directorate,
following Parker Service Bulletin 66179–29– SUMMARY: We propose to adopt a new 3960 Paramount Blvd., Lakewood, CA
486, dated August 4, 2016. Use the airworthiness directive (AD) for certain 90712–4137; phone: 562–627–5246; fax:
Accomplishment Instructions in Beechcraft Honeywell International Inc. 562–627–5210; email: joseph.costa@
Mandatory Service Bulletin SB 29–4161, (Honeywell) AS907–1–1A turbofan faa.gov.
dated November 18, 2016, to do the engines. This proposed AD was
replacement actions. SUPPLEMENTARY INFORMATION:
prompted by reports of loss of power
(i) Alternative Methods of Compliance due to failure of the second stage low- Comments Invited
(AMOCs) pressure turbine (LPT2) blade. This
We invite you to send any written
proposed AD would require a one-time
(1) The Manager, Wichita Aircraft relevant data, views, or arguments about
Certification Office (ACO), FAA, has the inspection of the LPT2 blades and, if the
this proposal. Send your comments to
authority to approve AMOCs for this AD, if blades fail the inspection, the
an address listed under the ADDRESSES
requested using the procedures found in 14 replacement of the blades with a part
section. Include ‘‘Docket No. FAA–
CFR 39.19. In accordance with 14 CFR 39.19, eligible for installation. We are
2017–0034; Directorate Identifier 2016–
send your request to your principal inspector proposing this AD to correct the unsafe
NE–32–AD’’ at the beginning of your
or local Flight Standards District Office, as condition on these products.
comments. We specifically invite
appropriate. If sending information directly DATES: We must receive comments on comments on the overall regulatory,
to the manager of the ACO, send it to the this proposed AD by August 4, 2017. economic, environmental, and energy
attention of the person identified in
ADDRESSES: You may send comments, aspects of this proposed AD. We will
paragraph (j)(1) of this AD.
using the procedures found in 14 CFR consider all comments received by the
(2) Before using any approved AMOC,
notify your appropriate principal inspector,
11.43 and 11.45, by any of the following closing date and may amend this
or lacking a principal inspector, the manager methods: proposed AD because of those
of the local flight standards district office/ • Federal eRulemaking Portal: Go to comments.
certificate holding district office. http://www.regulations.gov. Follow the We will post all comments we
instructions for submitting comments. receive, without change, to http://
(j) Related Information • Fax: 202–493–2251. www.regulations.gov, including any
(1) For more information about this AD, • Mail: U.S. Department of personal information you provide. We
contact Paul C. DeVore, Aerospace Engineer, Transportation, Docket Operations, M– will also post a report summarizing each
Wichita ACO, 1801 Airport Road, Room 100, 30, West Building Ground Floor, Room substantive verbal contact we receive
Wichita, Kansas 67209; telephone: (316) 946– W12–140, 1200 New Jersey Avenue SE., about this proposed AD.
4142; fax: (316) 946–4107, email: Washington, DC 20590.
paul.devore@faa.gov or Wichita-COS@ • Hand Delivery: Deliver to Mail Discussion
faa.gov. address above between 9 a.m. and 5 We received reports of a loss of power
(2) For service information identified in p.m., Monday through Friday, except due to failure of the LPT2 blade from
this AD, contact Textron Aviation Inc., Federal holidays. high-cycle fatigue in the blade’s dovetail
Textron Aviation Customer Service, P.O. Box
For service information identified in region at similar times-in-service. The
7706, Wichita, Kansas 67277; telephone:
this NPRM, contact Honeywell probable cause of this failure is wear
(316) 517–5800; email: premier@txtav.com;
Internet: www.txtavsupport.com; Internet:
International Inc., 111 S 34th Street, and fretting of the LPT2 blade Z gap
www.txtav.com. You may view this Phoenix, AZ 85034–2802; phone: 800– contact area at the blade tip shroud that
referenced service information at the FAA, 601–3099; Internet: https:// leads to loss of dampening and
Small Airplane Directorate, 901 Locust, myaerospace.honeywell.com/wps/ increased vibration of the LPT2 blade.
Kansas City, Missouri 64106. For information portal/!ut/. You may view this service This tip shroud condition in two new
information at the FAA, Engine & production engines with the same time-
asabaliauskas on DSKBBXCHB2PROD with PROPOSALS
on the availability of this material at the
FAA, call (816) 329–4148. Propeller Directorate, 1200 District in-service, if not corrected, could result
Avenue, Burlington, MA. For in failure of the LPT2 blades, failure of
Issued in Kansas City, Missouri, on June 9,
2017.
information on the availability of this one or more engines, and loss of the
material at the FAA, call 781–238–7125. airplane.
Robert Busto,
Acting Manager, Small Airplane Directorate, Examining the AD Docket Related Service Information Under 1
Aircraft Certification Service. You may examine the AD docket on CFR Part 51
[FR Doc. 2017–12512 Filed 6–19–17; 8:45 am] the Internet at http:// We reviewed Honeywell Service
BILLING CODE 4910–13–P www.regulations.gov by searching for Bulletin (SB) AS907–72–9067, Revision
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![28030 Federal Register / Vol. 82, No. 117 / Tuesday, June 20, 2017 / Proposed Rules
(4) Will not have a significant (3) If the measured wear and/or fretting of information in paragraph (j)(3) of this
economic impact, positive or negative, any Z gap contact area is greater than 0.005 proposed AD.
on a substantial number of small entities inch, replace the LPT2 rotor assembly with (3) For service information identified in
a part eligible for installation before further this proposed AD, contact Honeywell
under the criteria of the Regulatory
flight. International Inc., 111 S 34th Street, Phoenix,
Flexibility Act. (4) Do the following actions within 200 AZ 85034–2802; phone: 800–601–3099;
List of Subjects in 14 CFR Part 39 hours time in service after the effective date Internet: https://
of this AD: myaerospace.honeywell.com/wps/portal/!ut/.
Air transportation, Aircraft, Aviation (i) Using a borescope make a clear digital (4) You may view this service information
safety, Incorporation by reference, image of the Z gap contact area at the blade at the FAA, Engine & Propeller Directorate,
Safety. tip shroud of the 62 LPT2 rotor blades. 1200 District Avenue, Burlington, MA. For
(ii) Identify the three Z gap contact areas information on the availability of this
The Proposed Amendment with the greatest amount of wear and/or material at the FAA, call 781–238–7125.
Accordingly, under the authority fretting. Issued in Burlington, Massachusetts, on
delegated to me by the Administrator, (iii) Record the blade position on the LPT2 June 13, 2017.
rotor assembly and the measured wear of the
the FAA proposes to amend 14 CFR part Robert J. Ganley,
three Z gap contact areas with the greatest
39 as follows: amount of wear and/or fretting. Acting Manager, Engine & Propeller
(iv) Send the results to Honeywell at Directorate, Aircraft Certification Service.
PART 39—AIRWORTHINESS engine.reliability@honeywell.com within 30 [FR Doc. 2017–12561 Filed 6–19–17; 8:45 am]
DIRECTIVES days after completing these actions. BILLING CODE 4910–13–P
■ 1. The authority citation for part 39 (g) Credit for Previous Actions
continues to read as follows: You may take credit for the actions DEPARTMENT OF TRANSPORTATION
required by paragraphs (f)(1) and (4) of this
Authority: 49 U.S.C. 106(g), 40113, 44701.
AD, if you performed these actions before the Federal Aviation Administration
§ 39.13 [Amended] effective date of this AD using Honeywell SB
AS907–72–9067, Revision 0, dated December
■ 2. The FAA amends § 39.13 by adding 12, 2016. 14 CFR Part 39
the following new airworthiness [Docket No. FAA–2017–0560; Directorate
directive (AD): (h) Paperwork Reduction Act Burden
Statement Identifier 2016–NM–172–AD]
Honeywell International Inc.: Docket No.
A federal agency may not conduct or RIN 2120–AA64
FAA–2017–0034; Directorate Identifier
sponsor, and a person is not required to
2016–NE–32–AD.
respond to, nor shall a person be subject to Airworthiness Directives; Airbus
(a) Comments Due Date a penalty for failure to comply with a Airplanes
We must receive comments by August 4, collection of information subject to the
requirements of the Paperwork Reduction AGENCY: Federal Aviation
2017.
Act unless that collection of information Administration (FAA), DOT.
(b) Affected ADs displays a current valid OMB Control ACTION: Notice of proposed rulemaking
None. Number. The OMB Control Number for this (NPRM).
information collection is 2120–0056. Public
(c) Applicability reporting for this collection of information is SUMMARY: We propose to adopt a new
This AD applies to Honeywell estimated to be approximately 5 minutes per airworthiness directive (AD) for all
International Inc. (Honeywell) AS907–1–1A response, including the time for reviewing Airbus Model A310–203, –204, –221,
turbofan engines with second stage low- instructions, completing and reviewing the
–222, –304, –322, –324, and –325
pressure turbine (LPT2) rotor blades, part collection of information. All responses to
this collection of information are mandatory. airplanes. This proposed AD was
number (P/N) 3035602–1, installed.
Comments concerning the accuracy of this prompted by reports of cracking in the
(d) Subject burden and suggestions for reducing the drainage holes on the lower skin panel
Joint Aircraft System Component (JASC) burden should be directed to the FAA at: 800 in the center wing box between frames
Code 7250, Turbine Section. Independence Ave. SW., Washington, DC (FR) 42 and FR 46. This proposed AD
20591, Attn: Information Collection would require repetitive rotating probe
(e) Unsafe Condition Clearance Officer, AES–200. inspections for cracking of the trellis
This AD was prompted by reports of loss boom drainage holes, the holes in the
of power due to failure of the LPT2 blade. We (i) Alternative Methods of Compliance
are issuing this AD to prevent failure of the (AMOCs) stringers bottom, and the holes of the
LPT2 blades, failure of one or more engines, The Manager, Los Angeles Aircraft inner pump, and corrective actions if
and loss of the airplane. Certification Office, FAA, may approve necessary. We are proposing this AD to
AMOCs for this AD. Use the procedures address the unsafe condition on these
(f) Compliance found in 14 CFR 39.19 to make your request. products.
Comply with this AD within the
compliance times specified, unless already (j) Related Information DATES: We must receive comments on
done. (1) For more information about this this proposed AD by August 4, 2017.
(1) For LPT2 rotor blades, P/N 3035602–1 proposed AD, contact Joseph Costa, ADDRESSES: You may send comments,
that have more than 8,000 hours since new Aerospace Engineer, Los Angeles Aircraft
asabaliauskas on DSKBBXCHB2PROD with PROPOSALS
using the procedures found in 14 CFR
on the effective date of this AD, perform a Certification Office, FAA, Transport Airplane 11.43 and 11.45, by any of the following
one-time borescope inspection for wear of the Directorate, 3960 Paramount Blvd., methods:
Z gap contact area at the blade tip shroud for Lakewood, CA 90712–4137; phone: 562–627– • Federal eRulemaking Portal: Go to
each of the 62 LPT2 rotor blades within 200 5246; fax: 562–627–5210; email:
hours time in service after the effective date joseph.costa@faa.gov.
http://www.regulations.gov. Follow the
of this AD. (2) Honeywell SBs AS907–72–9067, instructions for submitting comments.
(2) Use the Accomplishment Instructions, Revision 0, dated December 12, 2016 and • Fax: 202–493–2251.
Paragraph 3.B.(1), of Honeywell Service AS907–72–9067, Revision 1, dated March 20, • Mail: U.S. Department of
Bulletin (SB) AS907–72–9067, Revision 1, 2017, can be obtained from Honeywell Transportation, Docket Operations, M–
dated March 20, 2017, to do the inspection. International Inc., using the contact 30, West Building Ground Floor, Room
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Document Created: 2017-06-20 02:20:41
Document Modified: 2017-06-20 02:20:41
| 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 August 4, 2017. | |
| Contact | Joseph Costa, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; phone: 562- 627-5246; fax: 562-627-5210; email: [email protected] | |
| FR Citation | 82 FR 28028 | |
| RIN Number | 2120-AA64 | |
| CFR Associated | Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety |
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