AD 2018-09-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | plc Turbojet | Airworthiness Directives; Rolls-Royce plc Turbojet Engines |
Unsafe Condition
An engine mainline bearing failure occurred on a Viper Mk. 632-43 engine because of debris being present in the engine oil system. The debris entered the oil system through a damaged oil pressure filter.
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Required Actions
Inspecting the oil pump assembly and oil pressure filter and replacing pre-modification parts with parts eligible for installation.
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Compliance Time
Within 25 flight hours or 30 days
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Affected Aircraft
Rolls-Royce plc Viper Mk. 601-22 turbojet engines
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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