# 2026-03615: Boeing 737s Get New Pilot Rules for Cabin Temp Woes

2026-03615, Airworthiness Directives; The Boeing Company Airplanes, is a Federal Register rule from Transportation Department, Federal Aviation Administration published 2026-02-24, effective 2026-02-24 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2026-03615
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-03615
- Title: Airworthiness Directives; The Boeing Company Airplanes
- Type: Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 8708
- Published: 2026-02-24
- Effective: 2026-02-24
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-06-11

## In one line

Boeing 737s Get New Pilot Rules for Cabin Temp Woes

## Summary

The FAA is making a new rule for Boeing 737-8, 737-9, and 737-8200 planes because some flights had trouble controlling cabin and cockpit temperatures. Pilots now have to follow updated instructions if a specific circuit breaker trips, keeping everyone safer in the air. This rule starts February 24, 2026, and airlines should update their manuals soon—no big costs, just smarter flying!

## Abstract

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.

## Effects PRIA read

- New cockpit and cabin overheat procedures: benefit, high. If you fly on or work on Boeing Model 737-8, 737-9, or 737-8200 airplanes, the FAA requires the airplane flight manual (AFM) be updated within 30 days after February 24, 2026 to add non-normal procedures for when the BAT BUS SECT 2 circuit breaker trips. The new procedures (appendices 1–3) include…
- Small one-time operator compliance cost: cost, low. Airlines and operators of Boeing 737-8, 737-9, and 737-8200 airplanes must revise the AFM within 30 days after February 24, 2026. The FAA estimates this takes 1 work-hour at $85 per airplane, affecting 771 U.S.-registered airplanes, with an aggregate estimated cost to U.S. operators of $65,535.

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## Sources
- [2026-03615 on federalregister.gov](https://www.federalregister.gov/documents/2026/02/24/2026-03615/airworthiness-directives-the-boeing-company-airplanes)
- [2026-03615 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-02-24/pdf/2026-03615.pdf)

## Related
- [Previous: 2026-03613, Airworthiness Directives; General Electric Company Engines](https://policyrisk.com/federal-register/2026-03613)
- [Next: 2026-03629, Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Depa…](https://policyrisk.com/federal-register/2026-03629)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-03615 (as of 2026-06-11).