AD 99-27-11
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
Uncommanded deployment of the thrust reverser in flight or on the ground, which could result in reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the thrust reverser control unit selector valve with a new or modified valve. Inspect for proper rigging of the thrust reverser cable drums and thrust reverser control unit selector valve detent, and perform corrective actions if discrepancies are found. Revise the Airplane Flight Manual to include procedures for uncommanded thrust reverser deployment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after effective date for inspections and AFM revision; within 12 months for valve replacement. Some actions require compliance prior to further flight if discrepancies are found.
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, all serial numbers, certificated in any category.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.