AD 75-16-14
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
Static inverter failure which could result in the loss of the A.C. emergency power supply to essential flight instruments.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the Rotax static inverter with a serviceable P/N U6705/1 or U6724/1, or modify the installed inverter by changing resistors R6 and R7 on Printed Circuit Board No. 1 from 220 ohms/1.5 watt to 82 ohms/0.25 watt or 0.5 watt and satisfy functional tests per Rotax Service Bulletin No. 24-420 at Revision 1.
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Compliance Time
within the next 500 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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