Fuselage - Sloping Pressure Deck Web Solid Rivets - Inspection
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Boeing Model 777-200, -200LR, -300, -300ER, and 777F airplanes must perform detailed inspections of the sloping pressure deck web for damaged solid rivets by October 22, 2021. If damage is found, applicable on-condition repairs must be completed following Boeing Alert Requirements Bulletin 777-53A0093 RB. Requests for compliance time extensions can be submitted to the FAA with supporting data for safety evaluation.
Summary
The Federal Aviation Administration's Final Rule titled 'Fuselage - Sloping Pressure Deck Web Solid Rivets - Inspection' is an airworthiness directive (AD 2021-18-09) applicable to all Boeing Model 777 airplanes. It addresses the discovery of solid rivets with missing heads on the sloping pressure deck web, which could compromise structural integrity and hydraulic systems. The directive mandates detailed inspections and corrective actions to ensure continued airworthiness.
What changed
This new airworthiness directive introduces mandatory detailed inspections of the left and right sloping pressure deck webs at specified stations on Boeing 777 aircraft. It requires operators to identify and repair any damaged or missing solid rivets, with specific on-condition actions including rivet replacement and possible repairs guided by Boeing Alert Requirements Bulletin 777-53A0093 RB. The directive also revises inspection and repair procedures based on stakeholder feedback to clarify compliance and reduce work-hours where applicable.
Why it matters
This AD is critical for aviation professionals because damaged or missing rivets on the sloping pressure deck web can lead to decompression, loss of hydraulic systems essential for wheel brakes and steering, and potential runway excursions. Operators, maintenance, and compliance teams must address these risks promptly to maintain aircraft safety and regulatory compliance. The directive ensures structural integrity and operational safety of Boeing 777 fleets worldwide.
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