AD 96-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-B15G | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-B17F | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-B17F/1 | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-B17F/2 | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-C20 | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-C20B | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-C20F | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-C20J | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-C20R | Airworthiness Directives; Allison 250 Series Turbine Engines |
| engine | Rolls-Royce Corporation | 250-C20R/1 | Airworthiness Directives; Allison 250 Series Turbine Engines |
Unsafe Condition
Bearing failure due to bearing separator instability in Superior Air Parts, Inc. PMA bearings (P/N A6871505 and A23007152), which can result in subsequent turbine and engine failure.
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Required Actions
Initial visual inspection of engine filters for metal particles within 20 days after the effective date. Repetitive inspections at intervals not exceeding 25 hours time in service for first 300 hours, then 100 hours intervals until engine overhaul or bearing replacement. Replace Superior bearings with Allison P/N 6871505 and 23031478 to terminate inspections.
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Compliance Time
Within 20 days after the effective date of this AD, followed by repetitive inspections at intervals not to exceed 25 hours time in service since last inspection for the first 300 hours TIS, then 100 hours TIS intervals until engine overhaul or bearing replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Allison Model 250-B15G, -B17F, -B17F/1, -B17F/2, -C20, -C20B, -C20F, -C20J, -C20S, -C20W, -R, -C20R/1, -C20R/2, -C20R/4, -C28B, -C28C, -C30, -C30P, -C30M, and -C30G turbine engines with Superior Air Parts, Inc. PMA bearings P/N A6871505 and A23007152 installed.
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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