AD 99-05-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes |
Unsafe Condition
Cracking in the flight deck canopy area, specifically in the top sill joint strap at station 82.5, frame at station 113, and frame at station 160.5 (left-hand side only) between stringers 13 and 15, which could result in reduced structural integrity of the flight deck frame and adjacent fuselage structure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform detailed visual inspections and eddy current inspections of specified areas to detect cracks, replace cracked parts with new parts or repair top sill members. Conduct a one-time inspection to determine fastener type in specific holes, replacing rivets with bolts if necessary. Follow British Aerospace Alert Service Bulletin 53-A-PM5994, Issue 5, for compliance.
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Compliance Time
Required as indicated, unless accomplished previously. Inspections must be performed by the later of specific landing or time-in-service thresholds, with subsequent intervals not exceeding 5,000 landings or 7,500 hours (for ≤7.5 psi cabin pressure) or 3,500 landings or 5,250 hours (for >7.5 psi ≤8.2 psi).
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Affected Aircraft
British Aerospace Model BAC 1-11 200 and 400 series airplanes, certificated in any category, including those modified with PM3187.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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