AD 95-05-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A Series Airplanes |
Unsafe Condition
Generator control units (GCU) may have the underfrequency trip level set too high, which could lead to the unwanted shutdown of an electrical generator, resulting in loss of all generated electrical power when other generator faults or failures occur.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 6 months after the effective date, check GCU part and serial numbers. Conduct closed loop tests on affected units. Adjust underfrequency trip level or replace GCU if level exceeds specified limits. Conduct post assembly testing after adjustment or replacement.
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Compliance Time
Within 6 months after the effective date of this AD, check the part and serial number on the data plate of each generator control unit (GCU). If the part number is one of those affected and the serial number is listed in Addendum 1 of GEC-Marconi Service Bulletin HGE 24-23, dated March 11, 1994, prior to further flight, conduct a closed loop test...
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Affected Aircraft
British Aerospace Model BAe 146-100A, -200A, and -300A 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
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