Fuselage - Pressure Bulkhead Stringer Sidewalls / Assemblies - Inspection
- Published
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- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Boeing 747-8 and 747-8F airplanes must perform the required inspections and any necessary repairs according to Boeing Alert Requirements Bulletin 747-53A2910 RB, starting no later than August 24, 2023. They must follow the specified inspection intervals and use FAA-approved repair methods when cracks are detected. Requests for alternative compliance methods should be submitted to the FAA as outlined in the directive.
Summary
The Federal Aviation Administration's Airworthiness Directive 2023-11-11 is a final rule addressing all Boeing 747-8 and 747-8F series airplanes. It mandates repetitive inspections of stringer sidewalls and assemblies near the pressure bulkhead at station 2360 due to reported cracks. This directive aims to ensure structural integrity by detecting and repairing stress corrosion cracking in critical fuselage components.
What changed
This new airworthiness directive introduces mandatory repetitive inspections using low and high frequency eddy current techniques on specific stringers around the pressure bulkhead at STA 2360. It requires operators to perform on-condition repairs if cracks are found, following Boeing's specified service bulletin procedures. The AD also clarifies compliance timelines and repair approval processes.
Why it matters
This directive is crucial for aviation professionals as it addresses a structural safety risk that could compromise the airplane's ability to sustain limit loads. Operators and maintenance teams must implement these inspections to prevent undetected cracks that could lead to structural failure. Compliance ensures continued airworthiness and safety of the Boeing 747-8 fleet.
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