AD 77-15-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes |
Unsafe Condition
Failure of the light alloy stop (P/N AB55-2301) on the cabin pressure discharge valve manual control could cause inadvertent loss of cabin pressure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the light alloy stop P/N AB55-2301 with improved strength stop P/N AB55-3433 or FAA-approved equivalent on the gear wheel and drum assembly of the air conditioning discharge valve manual control (P/N AB55A-2425 or ED55A779).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 200 hours time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BRITISH AIRCRAFT CORPORATION Models 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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