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Federal Register / Vol. 86, No. 161 / Tuesday, August 24, 2021 / Proposed Rules
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by October 8, 2021.
b Affected ADs None.
c Applicability This AD applies to all General Electric Company GE CF3410E2A1, CF3410E5, CF3410E5A1, CF3410E6, CF3410E6A1, CF3410E7, and CF3410E7B model turbofan engines with a stationary oil seal, part number P/N B131600453 or P/N
B131601274, installed at the No.1 forward bearing, that has used high thermal stability HTS oil or high performance capability HPC oil for 56 or more flight hours FHs during the life of the stationary oil seal.
d Subject Joint Aircraft System Component JASC
Code 7261, Turbine Engine Oil System.
e Unsafe Condition This AD was prompted by investigation by the manufacturer that revealed Teflon material in the A-sump oil strainer strainer assembly screen after several reports of inflight shutdowns and unscheduled engine removals. The FAA is issuing this AD to prevent failure of the stationary oil seal at the No.1 forward bearing. The unsafe condition, if not addressed, could result in failure of the engine, in-flight shutdown, and loss of control of the airplane.

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f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Within the compliance time specified in paragraph g1i or ii of this AD, as applicable, perform an initial visual inspection of the strainer assembly screen for Teflon material. Guidance on performing the visual inspections of the strainer assembly screen can be found in the Accomplishment Instructions, paragraphs 3.A.1d, of GE
CF3410E Service Bulletin SB 720365
R04, dated April 27, 2021.
i For an affected stationary oil seal having fewer than 2,250 flight hours FHs since new on the effective date of this AD, perform the initial inspection of the strainer assembly screen at the next engine shop visit after accumulating 2,250 FHs since new, but no later than 2,350 FHs since new.
ii For an affected stationary oil seal having 2,250 or more FHs since new on the effective date of this AD, perform the initial inspection of the strainer assembly screen within 100 FHs after the effective date of this AD.
2 Thereafter, within the following compliance times, repeat the visual inspection of the strainer assembly screen required by paragraph g1 of this AD:
i For an affected stationary oil seal having 2,250 to 7,000 FHs since new at the time of the last inspection, repeat the visual inspection every 750 FHs.
ii For an affected stationary oil seal having 7,001 to 10,000 FHs since new at the
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time of the last inspection, repeat the visual inspection every 375 FHs.
iii For an affected stationary oil seal having more than 10,000 FHs since new at the time of the last inspection, repeat the visual inspection every 100 FHs.
3 If, based on the inspections required by paragraph g1 or 2 of this AD, Teflon material is found in the strainer assembly screen, before further flight, remove the stationary oil seal at the No. 1 forward bearing from service and replace it with a part eligible for installation.
4 Before an affected stationary oil seal accumulates 10,000 FHs since new or within 500 FHs after the effective date of this AD, whichever occurs later, remove the stationary oil seal at the No. 1 forward bearing from service and replace it with a part eligible for installation.
h Terminating Action Removal of the stationary oil seal, P/N
B131600453 or P/N B131601274, installed at the No. 1 forward bearing, and replacement with a part eligible for installation, constitutes terminating action for the initial and repetitive inspections required by paragraphs g1 and 2 of this AD.
i Definition For the purpose of this AD, a part eligible for installation is a stationary oil seal that has a P/N other than P/N B131600453 or P/
N B131601274.
j Special Flight Permit Special flight permits, as described in 14
CFR 21.197 and 21.199, are subject to the requirements of paragraph j1 of this AD.
1 Operators who are prohibited from further flight due to Teflon material found in the strainer assembly screen may perform a non-revenue ferry flight, consisting of no more than five cycles, to a location where the engine can be removed from service if operators perform the actions in Appendix A, paragraph 4.A., GE CF3410E Service Bulletin SB 720365 R04, dated April 27, 2021 and the engine still meets the criteria in paragraph 4.A. for flying an additional five cycles. This ferry flight must be performed with only essential flight crew, without passengers, and involve non-ETOPS
operations.
2 Reserved k 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 Related Information. You may email your request to ANE-AD-AMOC@
faa.gov.
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.

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l Related Information 1 For more information about this AD, contact Scott Stevenson, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781
2387132; fax: 781 2387199; email:
Scott.M.Stevenson@faa.gov.
2 For service information identified in this AD, contact General Electric Company, GE Aviation, Room 285, 1 Neumann Way, Cincinnati, OH 45215; phone: 513 552
3272; email: aviation.fleetsupport@
ae.ge.com; website: www.ge.com. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781 2387759.
Issued on August 18, 2021.
Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202118148 Filed 82321; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 139
Docket No.: FAA20100997; Notice No.
1604
RIN 2120AJ38

Safety Management System for Certificated Airports Federal Aviation Administration FAA, DOT.
ACTION: Supplemental notice of proposed rulemaking SNPRM;
reopening of comment period.
AGENCY:

This action reopens the comment period for the Safety Management System for Certificated Airports SNPRM published July 14, 2016. In the SNPRM, the FAA proposed to amend certain requirements included in the notice of proposed rulemaking published on October 7, 2010. Most notably, the FAA revised the proposed applicability of the rule so that a Safety Management System SMS is only required for a certificated airport classified as a small, medium, or large hub airport in the National Plan of Integrated Airport Systems; serving international air traffic; or having more than 100,000 total annual operations.
The FAA also proposed changes that would extend the implementation period from 18 to 24 months; require submission of an implementation plan within 12 months instead of 6 months of the effective date of the final rule;
modify the training requirements;

SUMMARY:

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24AUP1