AD Amdt-39-11182
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France Model SA-365N, N1, N2, N3, and SA-366G1 | Airworthiness Directives; Eurocopter France Model SA-365N, N1, N2, N3, and SA-366G1 Helicopters |
Unsafe Condition
Cracks in the main gearbox (MGB) planetary gear shaft could lead to MGB failure and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a MGB planetary gear shaft vibration level monitoring unit (VLMU). Insert procedures into the Rotorcraft Flight Manual (RFM) for a preflight vibration check using the VLMU. Insert a related emergency procedure and limitation for an inoperative VLMU into the RFM.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Eurocopter France Model SA-365N, N1, N2, N3, and SA-366G1 helicopters with all variants of the main gearbox (MGB).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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