AD 2006-20-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | Corporation Models 250-C30 | Airworthiness Directives; Rolls-Royce Corporation Models 250-C30, 250-C40, and 250-C47 Series Turboshaft Engines |
Unsafe Condition
Failures of third-stage turbine wheels, which could lead to loss of power, possible engine shutdown, or uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the third- and fourth-stage turbine wheels as required by the additional life limit specified in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the compliance time specified in the AD.
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Affected Aircraft
Rolls-Royce Corporation models 250-C30, -C30G, -C30G/2, -C30M, -C30P, -C30R, -C30R/1, -C30R/3, -C30R/3M, -C30S, -C30U, -C40B, -C47B, and -C47M turboshaft engines with third-stage turbine wheel, P/N 6898663 or P/N 23065843, or fourth-stage turbine wheel, P/N 6892764 or P/N 23066744, installed. These engines are installed on, but not limited to, Bell 206L-3, Bell 206L-4, Bell 230, Bell 407, Bell 430, MDHI 369F, MDHI 369FF, MDHI 600N, and Sikorsky S-76A 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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