Airworthiness Directive · Amendment 39-23265 · Electrical power
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 2026-13-05. Comply with the one in force.
This AD applies to all The Boeing Company Model 737-8, 737-9, and 737-8200 airplanes, certificated in any category.
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.
Within 30 days after the effective date of this AD, revise the Operating Procedures section of the existing AFM to include the information specified in appendices 1 through 3 of this AD. This may be done by inserting a copy of appendices 1 through 3 of this AD into the AFM.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
