83 FR 50862 - Airworthiness Directives; Pratt & Whitney Division (PW) Turbofan Engines
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration Federal Register Volume 83, Issue 196 (October 10, 2018)
Federal Aviation Administration
Federal Register Volume 83, Issue 196 (October 10, 2018)
| Page Range | 50862-50864 | |
| FR Document | 2018-21694 |
[Federal Register Volume 83, Number 196 (Wednesday, October 10, 2018)] [Proposed Rules] [Pages 50862-50864] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2018-21694] ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2018-0826; Product Identifier 2018-NE-27-AD] RIN 2120-AA64 Airworthiness Directives; Pratt & Whitney Division (PW) 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 Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 turbofan engines. This proposed AD was prompted by an in-flight failure of a 1st stage low-pressure compressor (LPC) blade. This proposed AD would require initial and repetitive thermal acoustic imaging (TAI) inspections for cracks in certain 1st stage LPC blades and removal of those blades that fail inspection. We are proposing this AD to address the unsafe condition on these products. DATES: We must receive comments on this proposed AD by November 26, 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 Pratt & Whitney Division, 400 Main St., East Hartford, CT 06118; phone: 800- 565-0140; fax: 860-565-5442. You may view this service information at the FAA, Engine and Propeller Standards Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781-238-7759. 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- 0826; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, the regulatory evaluation, any comments received, and other information. The street address for Docket Operations (phone: 800-647- 5527) is listed above. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Jo-Ann Theriault, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7105; fax: 781-238-7199; 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-2018-0826; Product Identifier 2018-NE-27-AD'' at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this NPRM. We will consider all comments received by the closing [[Page 50863]] date and may amend this NPRM 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 NPRM. Discussion We learned of an uncontained 1st stage LPC blade failure and inlet separation on a PW4000-112 series turbofan engine that occurred during a revenue flight. The fracture in the blade initiated from a low cycle fatigue crack in the airfoil. This blade failure was contained by the engine case, but there was subsequent uncontained forward release of the inlet cowl, causing damage to the aircraft and prompting an emergency descent. This condition, if not addressed, could result in an uncontained failure of a 1st stage LPC blade, damage to the engine, and damage to the airplane. Related Service Information Under 1 CFR Part 51 We reviewed PW Alert Service Bulletin (ASB) PW4G-112-A72-268, Revision No. 7, dated September 6, 2018. This PW ASB describes procedures for performing 1st stage LPC blade TAI inspections. 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 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 initial and repetitive TAI inspections of 1st stage LPC blades and removal of blades that fail inspection. Costs of Compliance We estimate that this proposed AD affects 120 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 ---------------------------------------------------------------------------------------------------------------- Inspection............................ 22 work-hours x $85 per $0 $1,870 $224,400 hour = $1,870. ---------------------------------------------------------------------------------------------------------------- We estimate the following costs to do any necessary replacements that would be required based on the results of the proposed 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 ---------------------------------------------------------------------------------------------------------------- Replace 1st stage LPC blade................... 0 work-hours x $85 per hour = $0 $125,000 $125,000 ---------------------------------------------------------------------------------------------------------------- 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 delegated the authority to issue ADs applicable to engines, propellers, and associated appliances to the Manager, Engine and Propeller Standards Branch, Policy and Innovation 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. [[Page 50864]] Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): Pratt & Whitney Division: Docket No. FAA-2018-0826; Product Identifier 2018-NE-27-AD. (a) Comments Due Date We must receive comments by November 26, 2018. (b) Affected ADs None. (c) Applicability This AD applies to all Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 turbofan engines, with 1st stage low-pressure compressor (LPC) blade, part numbers 52A241, 55A801, 55A801-001, 55A901, 55A901-001, 56A201, 56A201-001, or 56A221, installed. (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. (e) Unsafe Condition This AD was prompted by an uncontained 1st stage LPC blade failure. We are issuing this AD to prevent failure of the 1st stage LPC blade. The unsafe condition, if not addressed, could result in uncontained blade release, damage to the engine, and damage to the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) After the effective date of this AD, perform an initial Thermal Acoustic Imaging (TAI) inspection of the 1st stage LPC blades as follows: (i) For 1st stage LPC blades that have accumulated fewer than 6,500 cycles since new (CSN), perform a TAI inspection the next time the engine is separated at the M-flange, or prior to the 1st stage LPC blade accumulating 7,000 CSN, whichever occurs first. (ii) For 1st stage LPC blades that have accumulated 6,500 or more CSN, or if the cycles since the blade was new cannot be determined, or if the cycles since the blade was last TAI inspected cannot be determined, perform a TAI inspection within 500 flight cycles or 180 days from the effective date of this AD, whichever occurs first. (2) Thereafter, perform a TAI inspection of 1st stage LPC blades every time the engine is separated at the M-flange and the blades have accumulated 1,000 or more flight cycles since the last TAI inspection, not to exceed 6,500 flight cycles since the last TAI inspection. (3) If any 1st stage LPC blade fails the inspection required by paragraph (g)(1) or (2) of this AD, remove the blade from service and replace with a part eligible for installation before further flight. (4) The TAI inspection and disposition required for compliance with this AD must be accomplished by a method approved by the FAA. You can find a vendor that has an FAA-approved TAI inspection listed in the Vendor Services Section of PW Alert Service Bulletin (ASB) PW4G-112-A72-268, Revision No. 7, dated September 6, 2018. (h) Credit for Previous Actions You may take credit for the initial TAI inspection required by paragraph (g)(1) of this AD if you performed the TAI inspection before the effective date of this AD using PW ASB PW4G-112-A72-268, Revision No. 6, dated August 5, 2014. (i) Installation Prohibition Do not install any 1st stage LPC blade that has accumulated 1,000 or more flight cycles into any engine unless it has passed the inspection required by paragraph (g)(1) of this AD. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO 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 the attention of the person identified in paragraph (k) of this AD. You may email your request to: [email protected]. (2) 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. (k) Related Information (1) For more information about this AD, contact Jo-Ann Theriault, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA, 01803; phone: 781-238-7105; fax: 781-238- 7199; email: [email protected]. (2) For service information identified in this AD, contact Pratt & Whitney Division, 400 Main St., East Hartford, CT 06118; phone: 800-565-0140; fax: 860-565-5442. You may view this referenced service information at the FAA, Engine & Propeller Standards Branch, 1200 District Avenue, Burlington, MA, 01803. For information on the availability of this material at the FAA, call 781-238-7759. Issued in Burlington, Massachusetts, on September 28, 2018. Robert J. Ganley, Manager, Engine and Propeller Standards Branch, Aircraft Certification Service. [FR Doc. 2018-21694 Filed 10-9-18; 8:45 am] BILLING CODE 4910-13-P
![50862 Federal Register / Vol. 83, No. 196 / Wednesday, October 10, 2018 / Proposed Rules
incorporated PW SB PW2000–72–364, have (2) Before using any approved AMOC, DATES: We must receive comments on
incorporated PW SB PW2000–72–700, or notify your appropriate principal inspector, this proposed AD by November 26,
have had an M-flange replacement, perform or lacking a principal inspector, the manager 2018.
initial and repetitive ECIs of the diffuser case of the local flight standards district office/
M-flange as follows: certificate holding district office. ADDRESSES: You may send comments,
(i) Perform an initial ECI in accordance (3) AMOCs approved for AD 2017–11–06 using the procedures found in 14 CFR
with the ‘‘Last Shop Visit Activity’’ column (82 FR 26979, June 13, 2017) are approved as 11.43 and 11.45, by any of the following
and before exceeding the maximum cycles AMOCs for the corresponding provisions of methods:
since the last shop visit activity in the this AD. • Federal eRulemaking Portal: Go to
‘‘Initial Inspection’’ column of Table 1 of PW
Alert Service Bulletin (ASB) No. PW2000 (k) Related Information http://www.regulations.gov. Follow the
A72–765, Revision No. 4, dated January 25, (1) For more information about this AD, instructions for submitting comments.
2018, or within 1,000 cycles from the contact Kevin M. Clark, Aerospace Engineer, • Fax: 202–493–2251.
effective date of this AD, whichever occurs ECO Branch, FAA, 1200 District Avenue, • Mail: U.S. Department of
later. Burlington, MA 01803; phone: 781–238– Transportation, Docket Operations,
(ii) Evaluate the inspection results and 7088; fax: 781–238–7199; email: M–30, West Building Ground Floor,
perform re-inspections as necessary in kevin.m.clark@faa.gov. Room W12–140, 1200 New Jersey
accordance with Accomplishment (2) For service information identified in Avenue SE, Washington, DC 20590.
Instructions, ‘‘For Engines Installed on the this AD, contact Pratt & Whitney, 400 Main • Hand Delivery: Deliver to Mail
Aircraft,’’ paragraph 5, or the St., East Hartford, CT, 06118; phone: 860–
Accomplishment Instructions, ‘‘For Engines
address above between 9 a.m. and 5
565–0140; fax: 860–565–5442; email:
Removed from the Aircraft,’’ paragraph 4, of p.m., Monday through Friday, except
help24@pw.utc.com; internet: http://
PW ASB No. PW2000 A72–765, Revision No. fleetcare.pw.utc.com. You may view this Federal holidays.
4, dated January 25, 2018, as applicable. If referenced service information at the FAA, For service information identified in
given a cycle range, perform the subsequent Engine & Propeller Standards Branch, 1200 this NPRM, contact Pratt & Whitney
inspections before exceeding the maximum District Avenue, Burlington, MA 01803. For Division, 400 Main St., East Hartford,
number of cycles. information on the availability of this CT 06118; phone: 800–565–0140; fax:
(iii) Inspect the diffuser case M-flange material at the FAA, call 781–238–7759. 860–565–5442. You may view this
using, as applicable, either the
Issued in Burlington, Massachusetts, on service information at the FAA, Engine
Accomplishment Instructions, ‘‘For Engines
Installed on the Aircraft,’’ paragraphs 3.I. September 28, 2018. and Propeller Standards Branch, 1200
through 3.J., or the Accomplishment Robert J. Ganley, District Avenue, Burlington, MA 01803.
Instructions, ‘‘For Engines Removed from the Manager, Engine and Propeller Standards For information on the availability of
Aircraft,’’ paragraphs 3.D. through 3.E., of Branch, Aircraft Certification Service. this material at the FAA, call 781–238–
PW ASB No. PW2000 A72–765, Revision No. 7759.
[FR Doc. 2018–21693 Filed 10–9–18; 8:45 am]
4, dated January 25, 2018.
BILLING CODE 4910–13–P Examining the AD Docket
(h) Definition
You may examine the AD docket on
For the purpose of this AD, a ‘‘piece-part
opportunity’’ is defined as when the part is DEPARTMENT OF TRANSPORTATION the internet at http://
completely disassembled. www.regulations.gov by searching for
Federal Aviation Administration and locating Docket No. FAA–2018–
(i) Credit for Previous Actions 0826; or in person at Docket Operations
(1) You may take credit for the diffuser 14 CFR Part 39 between 9 a.m. and 5 p.m., Monday
case and HPT case inspections required by through Friday, except Federal holidays.
paragraphs (g)(1) and (3) of this AD if you [Docket No. FAA–2018–0826; Product The AD docket contains this NPRM, the
performed: Identifier 2018–NE–27–AD]
(i) an ECI of the diffuser case and the HPT
regulatory evaluation, any comments
case M-flange using the Accomplishment RIN 2120–AA64 received, and other information. The
Instructions of PW SB No. PW2000 72–763, street address for Docket Operations
Original Issue, dated March 22, 2013, or Airworthiness Directives; Pratt & (phone: 800–647–5527) is listed above.
(ii) a high sensitivity FPI of the diffuser Whitney Division (PW) Turbofan Comments will be available in the AD
case and the HPT case at a piece-part Engines docket shortly after receipt.
opportunity after January 1, 2010. FOR FURTHER INFORMATION CONTACT: Jo-
(2) You may take credit for only the AGENCY: Federal Aviation
diffuser case inspections required by Administration (FAA), DOT. Ann Theriault, Aerospace Engineer,
paragraphs (g)(1) and (3) of this AD if you ACTION: Notice of proposed rulemaking ECO Branch, FAA, 1200 District
performed an ECI of the diffuser case M- (NPRM). Avenue, Burlington, MA 01803; phone:
flange using the Accomplishment 781–238–7105; fax: 781–238–7199;
Instructions of PW ASB No. PW2000 A72– SUMMARY: We propose to adopt a new email: jo-ann.theriault@faa.gov.
765, Revision No. 3, dated December 19, airworthiness directive (AD) for certain SUPPLEMENTARY INFORMATION:
2017, or an earlier version. Pratt & Whitney Division (PW) PW4074,
PW4074D, PW4077, PW4077D, Comments Invited
(j) Alternative Methods of Compliance
(AMOCs) PW4084D, PW4090, and PW4090–3 We invite you to send any written
(1) The Manager, ECO Branch, FAA, has turbofan engines. This proposed AD was relevant data, views, or arguments about
the authority to approve AMOCs for this AD, prompted by an in-flight failure of a 1st this proposal. Send your comments to
if requested using the procedures found in 14 stage low-pressure compressor (LPC) an address listed under the ADDRESSES
daltland on DSKBBV9HB2PROD with PROPOSALS
CFR 39.19. In accordance with 14 CFR 39.19, blade. This proposed AD would require section. Include ‘‘Docket No. FAA–
send your request to your principal inspector initial and repetitive thermal acoustic 2018–0826; Product Identifier 2018–
or local Flight Standards District Office, as imaging (TAI) inspections for cracks in NE–27–AD’’ at the beginning of your
appropriate. If sending information directly
to the manager of the certification office,
certain 1st stage LPC blades and comments. We specifically invite
send it to the attention of the person removal of those blades that fail comments on the overall regulatory,
identified in paragraph (k)(1) of this AD. You inspection. We are proposing this AD to economic, environmental, and energy
may email your request to: ANE-AD- address the unsafe condition on these aspects of this NPRM. We will consider
AMOC@faa.gov. products. all comments received by the closing
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![50864 Federal Register / Vol. 83, No. 196 / Wednesday, October 10, 2018 / Proposed Rules
§ 39.13 [Amended] be accomplished by a method approved by DEPARTMENT OF THE TREASURY
■ 2. The FAA amends § 39.13 by adding the FAA. You can find a vendor that has an
the following new airworthiness FAA-approved TAI inspection listed in the Internal Revenue Service
directive (AD): Vendor Services Section of PW Alert Service
Bulletin (ASB) PW4G–112–A72–268, 26 CFR Part 1
Pratt & Whitney Division: Docket No. FAA–
2018–0826; Product Identifier 2018–NE– Revision No. 7, dated September 6, 2018.
27–AD. (h) Credit for Previous Actions [REG–104226–18]
(a) Comments Due Date You may take credit for the initial TAI
We must receive comments by November inspection required by paragraph (g)(1) of RIN 1545–BO51
26, 2018. this AD if you performed the TAI inspection
before the effective date of this AD using PW Availability of Additional Guidance
(b) Affected ADs
ASB PW4G–112–A72–268, Revision No. 6, Under Section 965
None. dated August 5, 2014.
(c) Applicability AGENCY: Internal Revenue Service (IRS),
(i) Installation Prohibition
This AD applies to all Pratt & Whitney Treasury.
Division (PW) PW4074, PW4074D, PW4077, Do not install any 1st stage LPC blade that
PW4077D, PW4084D, PW4090, and PW4090– has accumulated 1,000 or more flight cycles ACTION: Notice of Proposed Rulemaking;
3 turbofan engines, with 1st stage low- into any engine unless it has passed the notice of availability.
pressure compressor (LPC) blade, part inspection required by paragraph (g)(1) of
numbers 52A241, 55A801, 55A801–001, this AD. SUMMARY: This document announces the
55A901, 55A901–001, 56A201, 56A201–001, availability of additional guidance
or 56A221, installed. (j) Alternative Methods of Compliance
(AMOCs) regarding the transition tax under
(d) Subject section 965 issued as Notice 2018–78.
(1) The Manager, ECO Branch, FAA, has
Joint Aircraft System Component (JASC)
the authority to approve AMOCs for this AD, DATES: Notice 2018–78 was made
Code 7230, Turbine Engine Compressor
Section. if requested using the procedures found in 14 available on the Internal Revenue
CFR 39.19. In accordance with 14 CFR 39.19, Service (IRS) website on October 1,
(e) Unsafe Condition send your request to your principal inspector 2018, and will be published in the
This AD was prompted by an uncontained or local Flight Standards District Office, as Internal Revenue Bulletin on October
1st stage LPC blade failure. We are issuing appropriate. If sending information directly 15, 2018.
this AD to prevent failure of the 1st stage LPC to the manager of the certification office,
blade. The unsafe condition, if not addressed, send it to the attention of the person ADDRESSES: Notice 2018–78 is available
could result in uncontained blade release, on the IRS website at https://
identified in paragraph (k) of this AD. You
damage to the engine, and damage to the
airplane. may email your request to: ANE-AD-AMOC@ www.irs.gov/pub/irs-drop/n-18-78.pdf
faa.gov. and at the Federal eRulemaking Portal at
(f) Compliance (2) Before using any approved AMOC, http://www.regulations.gov (under REG–
Comply with this AD within the notify your appropriate principal inspector, 104226–18).
compliance times specified, unless already or lacking a principal inspector, the manager
done. of the local flight standards district office/ FOR FURTHER INFORMATION CONTACT: Leni
certificate holding district office. C. Perkins at (202) 317–6934.
(g) Required Actions
(1) After the effective date of this AD, (k) Related Information SUPPLEMENTARY INFORMATION: On August
perform an initial Thermal Acoustic Imaging 9, 2018, the Department of the Treasury
(TAI) inspection of the 1st stage LPC blades (1) For more information about this AD,
(‘‘Treasury Department’’) and the IRS
as follows: contact Jo-Ann Theriault, Aerospace
Engineer, ECO Branch, FAA, 1200 District
published in the Federal Register (83
(i) For 1st stage LPC blades that have
accumulated fewer than 6,500 cycles since Avenue, Burlington, MA, 01803; phone: 781– FR 39514) a notice of proposed
new (CSN), perform a TAI inspection the 238–7105; fax: 781–238–7199; email: jo- rulemaking (REG–104226–18), which
next time the engine is separated at the M- ann.theriault@faa.gov. contained proposed §§ 1.962–1 and
flange, or prior to the 1st stage LPC blade (2) For service information identified in 1.962–2, 1.965–1 through 1.965–9, and
accumulating 7,000 CSN, whichever occurs this AD, contact Pratt & Whitney Division, 1.986(c)–1 (the ‘‘proposed regulations’’).
first. The proposed regulations relate to
(ii) For 1st stage LPC blades that have 400 Main St., East Hartford, CT 06118;
accumulated 6,500 or more CSN, or if the phone: 800–565–0140; fax: 860–565–5442. section 965 of the Internal Revenue
cycles since the blade was new cannot be You may view this referenced service Code. On October 1, 2018, the Treasury
determined, or if the cycles since the blade information at the FAA, Engine & Propeller Department and the IRS issued Notice
was last TAI inspected cannot be determined, Standards Branch, 1200 District Avenue, 2018–78, which contained additional
perform a TAI inspection within 500 flight Burlington, MA, 01803. For information on guidance relating to section 965 and the
cycles or 180 days from the effective date of the availability of this material at the FAA, proposed regulations. The notice was
this AD, whichever occurs first. call 781–238–7759.
(2) Thereafter, perform a TAI inspection of issued in advance of final regulations
1st stage LPC blades every time the engine is Issued in Burlington, Massachusetts, on under section 965 due to the imminent
separated at the M-flange and the blades have September 28, 2018. filing deadlines that could otherwise
accumulated 1,000 or more flight cycles since Robert J. Ganley, apply to the forms and elections
daltland on DSKBBV9HB2PROD with PROPOSALS
the last TAI inspection, not to exceed 6,500 described therein.
flight cycles since the last TAI inspection. Manager, Engine and Propeller Standards
(3) If any 1st stage LPC blade fails the Branch, Aircraft Certification Service. Martin V. Franks,
inspection required by paragraph (g)(1) or (2) [FR Doc. 2018–21694 Filed 10–9–18; 8:45 am] Chief, Publications and Regulations Branch,
of this AD, remove the blade from service BILLING CODE 4910–13–P Legal Processing Division, Associate Chief
and replace with a part eligible for Counsel, (Procedure and Administration).
installation before further flight.
(4) The TAI inspection and disposition [FR Doc. 2018–22022 Filed 10–9–18; 8:45 am]
required for compliance with this AD must BILLING CODE 4830–01–P
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Document Created: 2018-10-10 17:38:45
Document Modified: 2018-10-10 17:38:45
| 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 November 26, 2018. | |
| Contact | Jo-Ann Theriault, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7105; fax: 781-238-7199; email: [email protected] | |
| FR Citation | 83 FR 50862 | |
| RIN Number | 2120-AA64 | |
| CFR Associated | Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety |
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