AD 93-24-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; BRITISH AEROSPACE Model ATP Airplanes |
Unsafe Condition
Loss of all primary electric power sources due to failure of the alternative three-phase circuit breaker auto-changeover system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Trip and lock out the alternative three-phase circuit breaker to each transformer rectifier unit, revise the AFM Emergency and Abnormal Procedures Sections with specified temporary revisions, replace Cutler Hammer contactors with Leach type HA1F, and amend AFM Section 0.25.0 as per specified service bulletins.
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Compliance Time
Within 30 hours time-in-service after January 24, 1992, and within 6 months after January 21, 1994.
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Affected Aircraft
BAE Systems (Operations) Limited Model ATP airplanes, serial numbers 2001 through 2053 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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