AD Amdt-39-9749
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Allison | 250 Series Turbine | Airworthiness Directives; Allison 250 Series Turbine Engines |
Unsafe Condition
Premature wear of bearings produced under PMA by Superior Air Parts, Inc. due to bearing separator instability, which can result in turbine and engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct initial and repetitive visual inspections of all engine filters for metal particles. Replace bearings with those incorporating improved retainers to terminate inspection requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Allison 250 series turbine engines with bearings manufactured by Superior Air Parts, Inc.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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