Boeing Mechanics Installed Plane Brakes Backwards, Whoops
Published Date: 11/25/2025
Rule
Summary
The FAA is making sure certain Boeing 737 planes get a quick check to fix brake problems that could cause accidents. Starting December 10, 2025, airlines must inspect and test the landing gear brake hoses and sensors to keep flights safe. This fix helps avoid costly crashes and keeps passengers secure, with comments open until January 9, 2026.
Analyzed Economic Effects
3 provisions identified: 1 benefits, 2 costs, 0 mixed.
Required inspections and tests for Boeing 737s
If you operate Boeing Model 737-700, -800, -900, or -900ER airplanes, you must do a general visual inspection of left and right main landing gear brake hydraulic hoses and perform antiskid valve and transducer operational tests per Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025. These actions are required beginning December 10, 2025, and must be done within the compliance times in the bulletin.
Action prevents runway excursion risk
The AD targets incorrectly installed (crossed) brake hydraulic hoses and interchanged left main landing gear wheel speed transducer wires that the FAA says could cause incorrect antiskid operation and loss of braking, possibly leading to a runway excursion with serious or fatal injuries. The AD requires the inspections and tests to address that unsafe condition.
Estimated compliance and reporting costs
The FAA estimates the inspection and tests cost 7 work-hours at $85 per hour = $595 per airplane. The FAA expects about 100 U.S.-registered airplanes will need immediate action for an estimated total cost to U.S. operators of $59,500; on-condition installation is estimated at 2 work-hours ($170) and reporting is estimated at 1 work-hour ($85) per response (OMB Control Number 2120-0056).
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