AD 70-15-09
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
The existing 200 ampere fuse in the APU starter motor circuit may fail due to overload, and airplanes without BAC 1-11 Modification PM2518 may have inadequate APU starting system protection.
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Required Actions
Replace the 200 ampere fuse with a 150 ampere fuse per Service Bulletin 49-PM4480. For airplanes without PM2518, install a second power relay per SB 49-PM2429 Rev 4 and a separate APU start control per SB 49-PM2891 Rev 5. Airplanes with PM2518 must complete these modifications within 1500 hours' time in service.
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Compliance Time
within the next 750 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
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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