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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules
any category, without a Boeing Sky Interior BSI.
d Subject Air Transport Association ATA of America Code 25, Equipment/furnishings.
e Unsafe Condition This AD was prompted by reports of passenger service units PSUs becoming detached from the supporting airplane structure in several Model 737 series airplanes during survivable accidents. The FAA is issuing this AD to address PSUs and life vest panels detaching from the supporting airplane structure, which could lead to passenger injuries and impede passenger and crew egress during evacuation.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Within 60 months after April 8, 2019 the effective date of AD 20190326, do all applicable actions identified as RC
required for compliance in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737251707, Revision 2, dated July 27, 2020.

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h Parts Installation Prohibition As of the applicable time specified in paragraph h1 or h2 of this AD, no person may install on any airplane a PSU or life vest panel, unless the lanyard assembly has been modified secondary retention features added or re-identified, as applicable, as required by paragraph g of this AD.
1 For airplanes that have PSUs or life vest panels without the secondary retention features installed: After modification or reidentification, as applicable, of the airplane as required by paragraph g of this AD.
2 For airplanes that have PSUs or life vest panels with the secondary retention features installed: As of the effective date of this AD.
i Alternative Methods of Compliance AMOCs 1 The Manager, Seattle 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 responsible Flight Standards 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.
Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office.
3 An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization ODA that has been authorized by the Manager, Seattle ACO Branch, FAA, to make
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those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD.
4 AMOCs approved for AD 20190326
are approved as AMOCs for the corresponding provisions of Boeing Special Attention Service Bulletin 737251707, Revision 2, dated July 27, 2020, that are required by paragraph g of this AD.
j Related Information 1 For more information about this AD, contact Tony Koung, Aerospace Engineer, Cabin Safety and Environmental Systems Section, FAA, Seattle ACO Branch, 2200
South 216th St., Des Moines, WA 98198;
phone and fax: 2062313985; email:
tony.koung@faa.gov.
2 For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services C&DS, 2600 Westminster Blvd., MC 110SK57, Seal Beach, CA 907405600;
telephone 5627971717; internet https
www.myboeingfleet.com. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195.
Issued on June 14, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202113931 Filed 62921; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210457; Project Identifier AD202001461T
RIN 2120AA64

Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to adopt a new airworthiness directive AD for certain The Boeing Company Model 7878, 7879, and 78710 airplanes.
This proposed AD was prompted by a report that during a fleet sampling inspection, cracks were found on the inner cylinder pivot pins of the left and right main landing gear MLG on one of the airplanes. This proposed AD would require repetitive lubrications of the left and right MLG truck beam and inner cylinder pivot joint, reviewing the
SUMMARY:

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maintenance program documentation to verify certain lubrication tasks are incorporated, doing repetitive inspections of the MLG inner cylinder pivot pins and inner cylinder bushings of the MLG truck beam and inner cylinder joint for any friction, heat damage, excessive wear, cracking and smearing of bushing material, and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by August 16, 2021.
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 https www.regulations.gov. Follow the instructions for submitting comments.
Fax: 2024932251.
Mail: U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 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 Boeing Commercial Airplanes, Attention: Contractual & Data Services C&DS, 2600 Westminster Blvd., MC 110SK57, Seal Beach, CA
907405600; telephone 5627971717;
internet https
www.myboeingfleet.com. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA.
For information on the availability of this material at the FAA, call 206231
3195. It is also available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210457.

ADDRESSES:

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210457; 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, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Allen Rauschendorfer, Senior Aerospace Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and
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