AD 77-14-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1- 11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1- 11 200 and 400 Series Airplanes |
Unsafe Condition
Cracks in the flap structure top surface skin panels and internal structure could lead to possible failure of the flap assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect top surface skin panels of all flaps for cracks at specified intervals, conduct X-ray inspections of flap structures as required, repair cracks according to specified criteria, and discontinue inspections upon incorporating specific modifications.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance is required as indicated in the AD, with specific intervals based on landing counts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
British Aircraft Corporation Model BAC 1-11 200 and 400 Series airplanes equipped with specific flap assemblies (Inboard, Center, Outboard) having part numbers AB09 A1/2, AK09 A121/2, etc.
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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