AD 84-25-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | TSIO-520-BE | TELEDYNE CONTINENTAL MOTORS Model TSIO-520BE Engines |
Unsafe Condition
Loss of engine oil due to cracks, deformation, or oil leaks at or near weld beads on turbocharger oil scavenge reservoirs P/N 646691 and 646692.
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Required Actions
Within 5 hours time in service, inspect reservoirs for cracks, deformation, or oil leaks. Replace defective parts with serviceable reservoirs. Continue inspections every 10 hours until P/N 646954/646955 are installed.
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Compliance Time
Within the next 5 hours time in service, and thereafter at intervals not to exceed 10 hours time in service.
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Affected Aircraft
Teledyne Continental Motors Model TSIO-520BE engines S/N 528001 through 528125 and 528138 with turbocharger oil scavenge reservoir P/N 646691 or 646692.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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