Landing Gear - Main Landing Gear Outer Cylinders - Records Check / Inspection
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must perform a records check or physical inspection of the left and right main landing gear outer cylinders within the compliance times specified in Boeing Alert Requirements Bulletin 737-32A1585 RB dated January 15, 2024. Any affected outer cylinders identified must be replaced promptly. The AD becomes effective on November 6, 2025, and compliance must be achieved accordingly.
Summary
The document titled "Landing Gear - Main Landing Gear Outer Cylinders - Records Check / Inspection" is a final rule airworthiness directive (AD 2025-19-12) issued by the Federal Aviation Administration (FAA) affecting all Boeing 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This AD addresses potential heat damage caused by improper grinding of the inner diameter of the main landing gear outer cylinders. It mandates inspections or records checks and replacement of affected parts to ensure continued airworthiness.
What changed
This new airworthiness directive introduces mandatory inspections or maintenance records checks to identify affected main landing gear outer cylinders on specified Boeing 737 models. It requires replacement of any outer cylinders found to be heat damaged due to improper grinding. The AD also clarifies that installation of winglets under STC ST00830SE does not affect compliance with the directive.
Why it matters
This AD is critical for aviation professionals because it addresses a structural safety risk that could lead to failure or collapse of the main landing gear, potentially causing loss of airplane control or runway excursions. Operators and maintenance organizations must ensure compliance to prevent unsafe conditions and avoid costly incidents. The directive also provides clear guidance on compliance timelines and approved methods, aiding regulatory adherence and operational safety.
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