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 Feb. 24, 2026. Document 2026-03615. Updated Nov. 14, 2026.

What it does

The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-8, 737-9, and 737-8200 airplanes. This AD was prompted by reports of in-flight events of excessive cabin and flight deck temperatures that could not be controlled by the flightcrew using existing procedures. This AD requires revising the existing airplane flight manual (AFM) to provide the flightcrew with operating procedures (non-normal checklists) if a certain circuit breaker in the standby power control unit (SPCU) trips. 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 489 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

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

Since then:

What happens next and when

This AD is effective February 24, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-03615
Action	Final rule; request for comments.
Agencies	Transportation Department; Federal Aviation Administration
Published	Feb. 24, 2026
Effective date	Feb. 24, 2026
Comments close	April 10, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-1332

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