Wings - Left- and Right-Side Form-in-Place Gasket - Inspection
- Published
- Takes effect
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 737-700, -700C, -800, and -900ER airplanes must perform detailed inspections of the FiP gaskets at the engine fuel shutoff valve access panels for correct sealant installation and conduct fluid leak tests. If leaks or sealant issues are found, they must carry out the specified on-condition actions, including gasket replacement and repairs. All required actions must be completed by December 1, 2026, the effective date of the directive.
Summary
Airworthiness Directive 2026-21-08 is a final rule issued by the Federal Aviation Administration (FAA) addressing certain Boeing 737-700, -700C, -800, and -900ER series airplanes. It mandates inspections of the left- and right-side form-in-place (FiP) gaskets at the engine fuel shutoff valve access panels to verify correct sealant installation and requires fluid leak tests to detect any leaks. The directive aims to prevent fuel leaks that could lead to fire hazards on the ground.
What changed
This new airworthiness directive introduces a detailed inspection requirement for the FiP gaskets at the engine fuel shutoff valve access panels on specified Boeing 737 models. It also requires fluid leak testing and applicable corrective actions such as gasket replacement or repairs if leaks are found. The directive updates the applicability to include additional airplane serial numbers and incorporates Boeing Alert Requirements Bulletin 737-57A1359 RB, Revision 1, dated June 25, 2026.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk involving potential fuel leaks caused by improper sealant application during production. Operators and maintenance organizations must ensure compliance to prevent fuel from leaking onto engine exhaust nozzles, which could result in fires on the ground. Timely inspections and corrective actions help maintain aircraft airworthiness and operational safety.
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