AD 2010-02-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Turbomeca Turmo IV A and IV C Turboshaft Engines |
| engine | Turbomeca | Turmo IV A and IV C | Airworthiness Directives; Turbomeca Turmo IV A and IV C Turboshaft Engines |
Unsafe Condition
A circumferential crack on the intermediate bearing return flexible pipe union (pipe part number 9 560 17 606 0) was identified as the origin of an oil leak. Similar cracks were reported on another engine with the same pipe part number.
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Required Actions
Initial and repetitive visual inspections for the absence of oil leakage or seepage from the unions of the intermediate bearing return flexible pipes are required.
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Compliance Time
Before further flight
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Affected Aircraft
Turbomeca Turmo IV A and IV C turboshaft engines that have incorporated Turbomeca Modification TU 233, installed on, but not limited to, Eurocopter SA 330F, G, or J PUMA helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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