AD 91-13-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; British Aerospace Model ATP Series Airplanes |
Unsafe Condition
Loss of engine oil and damage to the engine due to damaged or loose securing nuts and locking tab washers on the motor section to clutch housing.
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Required Actions
Within 30 days after the effective date, perform detailed visual inspections every 250 hours time-in-service per ATP-80-3. Replace studs, washers, and nuts with specified bolts and washers within 150 days per ATP-80-4, terminating inspections. Alternative methods may be approved.
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Compliance Time
Within 30 days after the effective date of this AD, and thereafter at intervals not to exceed 250 hours time-in-service
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Affected Aircraft
British Aerospace Model ATP series airplanes equipped with Lucas starter motors, Part Numbers C5114-04, C5114-05, C5114-07, and C5114-08.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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