AD 77-14-12
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
Leaks in the ring main ducts of the passenger oxygen system due to chafing or insufficient clearance with adjacent structure less than 0.050 inches.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect passenger oxygen ring main ducts per BAC Alert Service Bulletin 35-A-PM 5124. Address chafing or insufficient clearance by complying with specified provisions of the bulletin. Install an FAA-approved placard if system restrictions occur.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 500 hours time in service after the effective date of this AD
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Affected Aircraft
British Aircraft Corporation Model BAC 1-11, 200 and 400 series airplanes, certificated in all categories
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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