Airworthiness Directives; The Boeing Company Airplanes

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Sept. 29, 2026. Document 2026-19956. Updated Nov. 5, 2026.

What it does

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 and 787-9 airplanes. This AD was prompted by a report of the lack of data to substantiate engine operability when an airplane is dispatched under a certain master minimum equipment list (MMEL) item. This AD prohibits dispatching an airplane under the operational procedures of the operator's minimum equipment list item corresponding to a certain MMEL item. The FAA is issuing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Federal Aviation Administration has published 482 final rules in 2026 so far, compared with 518 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

1023 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

Sept. 29, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Leonardo S.p.a. Helicopters
Sept. 29, 2026 Final rule; correction. Airworthiness Directives; MD Helicopters, LLC Helicopters
Sept. 29, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
Sept. 28, 2026 Final rule. Airworthiness Directives; Safran Helicopter Engines, S.A. Engines
Sept. 28, 2026 Final rule. Airworthiness Directives; Hélicoptères Guimbal Helicopters
Sept. 28, 2026 Final rule; request for comments. Airworthiness Directives; Costruzioni Aeronautiche Tecnam S.P.A. Airplanes
Sept. 28, 2026 Final rule. Airworthiness Directives; Airbus Helicopters
Sept. 28, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

Since then:

What happens next and when

This AD is effective October 14, 2026. The FAA must receive comments on this AD by November 13, 2026

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-19956
Action	Final rule; request for comments.
Agencies	Transportation Department; Federal Aviation Administration
Published	Sept. 29, 2026
Effective date	Oct. 14, 2026
Comments close	Nov. 13, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-11785

Source: the Federal Register (public domain). The document in the Federal Register