Fuselage - Left and Right Side Lap Joints of the Fuselage Skin - Inspections / Modification
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 747-8 and 747-8F airplanes must comply with the modification and inspection requirements as specified in Boeing Alert Requirements Bulletin 747-53A2895 RB. All actions must be completed within the compliance times outlined in the bulletin, with the directive effective from June 2, 2020. Repairs required by the directive must be performed before further flight using FAA-approved methods.
Summary
The Federal Aviation Administration (FAA) Airworthiness Directive 2020-08-12 addresses certain Boeing 747-8 and 747-8F series airplanes. It mandates modifications and repetitive inspections of the left and right side lap joints of the fuselage skin due to the risk of widespread fatigue damage. This directive aims to prevent undetected fatigue cracks that could compromise structural integrity and cause sudden decompression.
What changed
This new airworthiness directive introduces requirements to modify the fuselage skin lap joints at specific stringers and to conduct repetitive post-modification inspections for cracking. It also mandates applicable on-condition actions such as repairs. The directive incorporates Boeing Alert Requirements Bulletin 747-53A2895 RB dated September 12, 2019, as the service information for compliance.
Why it matters
This directive is critical for aviation professionals because it addresses a significant safety risk related to widespread fatigue damage in the fuselage skin lap joints. Operators and maintenance organizations must implement these modifications and inspections to ensure continued airworthiness and prevent potential structural failures. Compliance helps maintain aircraft safety and regulatory adherence, reducing the risk of in-service incidents.
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