Fuselage - Stringers and Stringer Splice Fittings - Inspection
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Boeing 747-8F airplanes must perform the required inspections for radius fillers and cracking as specified in Boeing Alert Requirements Bulletin 747-53A2907 RB, Revision 1. Any identified issues must be addressed with the applicable on-condition actions, including contacting Boeing for repair instructions if necessary. Compliance with this AD is mandatory by August 6, 2026.
Summary
The Federal Aviation Administration's Airworthiness Directive 2026-13-03 addresses certain Boeing 747-8F series airplanes. This directive mandates inspections of fuselage stringers and stringer splice fittings for cracking and the presence of radius fillers at specific fastener locations. It also requires applicable on-condition actions to ensure continued airworthiness.
What changed
This new airworthiness directive introduces mandatory inspections of each free flange of the stringers at the stringer splice and detailed inspections for cracking in stringers and splice fittings at multiple body stations. It also establishes required on-condition actions such as removal, installation, or replacement of parts based on inspection findings. This AD is a new regulation prompted by reports of cracking and does not amend or supersede previous directives.
Why it matters
This AD is critical for aviation professionals as it addresses a structural safety concern that could affect the integrity of the Boeing 747-8F fuselage. Operators and maintenance organizations must comply to prevent potential in-flight failures and ensure regulatory compliance. Timely inspections and repairs help maintain aircraft safety and operational reliability.
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