AD 2009-09-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Eurocopter France Model EC225LP Helicopters |
Unsafe Condition
Failure of the main gearbox (MGB) due to degradation of the epicyclic reduction gear module, potentially caused by metal particles on the magnetic plug of the module.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine if the 'CHIP' detector light illuminated due to a metal particle on the magnetic plug of the MGB module. If so, or if the cause cannot be determined from maintenance records, replace the module with an airworthy one. Inspect the MGB module magnetic chip detector electrical circuit to ensure proper functioning. Replace the module with an airworthy one if the 'CHIP' detector light illuminates and stays illuminated after the 'CHIP PULSE' setting is activated, and a metal particle on the module magnetic plug is identified as the cause.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter France Model EC225LP helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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