AD 90-20-07
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
Failure of the APU air intake plenum overheat detection could result in undetected overheating and potential structural damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install temperature sensors in the APU air intake plenum per British Aerospace Alert Service Bulletin 49-A-PM5955, Issue 1, dated April 13, 1988. Alternate means of compliance or adjustments may be approved by the FAA Manager, Standardization Branch, ANM-113.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 30 days 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 Aerospace Model BAC 1-11 200 and 400 Series airplanes, 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.