AD 85-10-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 3101 | Airworthiness Directives; British Aerospace: Model 3101 Jetstream Airplanes |
Unsafe Condition
Inadequate clearance between the rear turbine bearing oil feed pipe and the bleed air pre-cooler may cause chafing and potential failure of the oil feed pipe.
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Required Actions
Inspect the rear turbine bearing oil feed pipe for chafing and clearance (minimum 0.25 inches) on LH and RH engines per BAe Alert Service Bulletin No. 71-A-JM7418. If clearance is less than 0.25 inches but no damage, repeat inspection every 400 hours time-in-service. If damage exists, accomplish BAe Modification JM7418 or JM7388 before further flight.
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Compliance Time
within 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
British Aerospace Regional Aircraft Model 3101 Jetstream airplanes with serial numbers 601 to 624 inclusive, and 627
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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