AD 2008-24-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France Model AS355E, F, F1, F2, and N | Airworthiness Directives; Eurocopter France Model AS355E, F, F1, F2, and N Helicopters |
Unsafe Condition
Failure of the main gearbox (MGB) lubrication pump, leading to MGB seizure, loss of drive to an engine and main rotor, and subsequent loss of control of the helicopter.
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Required Actions
Inspect the MGB magnetic chip detector plug for sludge and check the MGB oil-sight glass for dark oil. Remove and inspect the pump if sludge is found or if the oil appears dark. Use an improved procedure for detecting oil pump wear.
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Compliance Time
Before further flight
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Affected Aircraft
Eurocopter France Model AS355E, F, F1, F2, and N helicopters with a main gearbox lubrication pump, part number 355A32-0700-01, 355A32-0700-02, or 355A32-0701-00, any serial number, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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