AD 93-08-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; British Aerospace Model ATP Series Airplanes |
Unsafe Condition
Multiple engine power loss during flight in freezing precipitation due to inadequate electrical bonding between engine nacelle module 3 components and the airframe earth.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Measure the electrical resistance between engine nacelle module 3 components and airframe earth on both engine nacelles. Depending on resistance measurement, either reassemble throttle stepper motor controller, overseal bolts, and test standby power lever controls if resistance is less than 3 ohms, or accomplish specified service bulletin instructions if resistance is 3 ohms or more. Compliance must follow Jetstream Aircraft, Ltd. Service Bulletin ATP-24-55, Revision 1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 16 days after the effective date of this AD, with subsequent actions prior to further flight if required.
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Affected Aircraft
All Model ATP 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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