AD 2000-20-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | Arriel 1 Series | Airworthiness Directives; Turbomeca Arriel 1 Series Turboshaft Engines |
Unsafe Condition
Reports of gas generator rear bearing failures, which could lead to an uncommanded engine shutdown.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a chip detector with electronic warning on the rear bearing oil return system in accordance with Turbomeca Service Bulletin No. 292 72 0163, Revision 1, dated April 3, 1996.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days from the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca Arriel 1 A, -1 A1, -1 A2, -1 B, -1 C, -1 C1, -1 C2, -1 D, -1 D1, -1 K, -1 K1, -1 S, and -1 S1 turboshaft engines installed on, but not limited to, Eurocopter AS 356 C, AS 356 C1, AS 356 N2, AS 350 B, AS 350 B2N, AS 350 D, AS 550 U2, Augusta A109K2, Sikorsky S76A, S76A+, S76A++, and S76C helicopters.
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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