AD 71-06-09 R1
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
Malfunction of the auxiliary power unit (APU) air delivery duct nonreturn valve.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the APU air delivery duct nonreturn valve according to specified service bulletin paragraphs. Install a placard or amend the Airplane Flight Manual limitations. Replace the valve with specified part numbers if required.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours time in service after the effective date of this AD, unless already accomplished within the previous 60 hours time in service and thereafter at intervals not to exceed 160 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BRITISH AEROSPACE 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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