AD 91-26-07
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
Inaccurate flight instrument readings due to G.E.C. Plessey generator control units (GCU) with part numbers 700-1-22490-410 or 700-1-22490-510.
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Required Actions
Replace G.E.C. Plessey GCUs with part numbers 700-1-22490-410 or 510 using part numbers 700-1-22490-400 or 500 within 10 days after the effective date. Compliance alternatives may be approved by the FAA Manager, Standardization Branch.
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Compliance Time
Within 10 days after the effective date of this AD
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Affected Aircraft
British Aerospace Model BAe 146-100A, -200A, and -300A series airplanes equipped with G.E.C. Plessey GCUs listed in Alert Service Bulletin 24-A97 dated November 12, 1991.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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