FAA Tells 737 Pilots to Update Their Manuals Again
Published Date: 7/13/2026
Rule
Summary
The FAA is updating safety rules for Boeing 737-8, 737-9, and 737-8200 airplanes to fix a mistake in a previous manual update. Pilots must revise their flight manuals with the corrected procedures to keep flying safe. This change starts July 13, 2026, and won’t cost much but is super important for safe flights.
Analyzed Economic Effects
4 provisions identified: 1 benefits, 2 costs, 1 mixed.
Corrected procedures reduce overheat risk
The AD fixes a formatting error that omitted steps from the Cabin Temperature Hot PACK CONT VALVES RIGHT or LEFT Circuit Breaker Trips procedure. Correcting the AFM restores those procedures to address in-flight excessive cabin and flight deck temperatures that could lead to injury or incapacitation of flightcrew and passengers and possible inability to maintain safe flight and landing.
Airlines must update flight manuals
If you operate Boeing 737-8, 737-9, or 737-8200 airplanes, you must revise the airplane flight manual (AFM). The AD requires operators to insert appendices 1–3 within 30 days after February 24, 2026, and to insert the corrected appendix 5 and appendices 5 and 6 within 30 days after July 16, 2026, to provide corrected non-normal procedures.
Estimated one-time AFM revision cost
The FAA estimates this AD affects 825 U.S.-registered Boeing 737-8/9/8200 airplanes. Each AFM revision is estimated at 1 work-hour × $85 = $85 per airplane, and the FAA lists a cost on U.S. operators of $70,125 for each listed AFM revision action.
This AD is interim; further changes possible
The FAA considers this AD an interim action and says the manufacturer is developing a modification to fix the unsafe condition. The FAA may consider additional rulemaking once that modification is developed and FAA-approved.
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