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
Affected operators must perform detailed inspections of the FiP gasket or preformed seal at the engine fuel shutoff valve access panel, conduct fluid leak tests, and carry out required repairs or replacements if leaks or damage are detected. These actions must be completed by December 1, 2026. Operators should refer to Boeing Alert Requirements Bulletin 737-57A1358 RB for detailed procedures and ensure maintenance aligns with updated Boeing Aircraft Maintenance Manual tasks.
Summary
Airworthiness Directive 2026-21-07 is a final rule issued by the FAA addressing certain Boeing 737-8, 737-9, and 737-8200 airplanes. It mandates inspections and leak tests of the form-in-place (FiP) gasket at the engine fuel shutoff valve access panel on both left and right wings to detect incorrect sealant installation or damage. The directive aims to prevent fuel leaks that could lead to fires on the ground.
What changed
This new airworthiness directive introduces requirements for detailed inspections of the FiP gasket or preformed seal at the engine fuel shutoff valve access panel, fluid leak testing, and applicable corrective actions if leaks or damage are found. It clarifies inspection procedures and on-condition actions, including gasket replacement and repair, to address an unsafe condition caused by improper sealant application during production.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential fuel leaks that pose fire hazards. Compliance ensures aircraft safety by addressing a production-related sealing issue that could lead to fuel leaking onto the engine exhaust nozzle. It also aligns maintenance practices with updated Boeing procedures, reducing risk and supporting regulatory compliance.
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