AD 2006-13-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | Corporation 250-B and 250-C series | Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turboprop and Turboshaft Engines |
| engine | Allison | Engine Company | Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turboprop and Turboshaft Engines |
Unsafe Condition
Failure of gas producer rotor assembly tie bolts due to high cycle fatigue, which could cause loss of engine power, resulting in a first stage turbine wheel overspeed and an uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service affected gas producer rotor assembly tie bolts listed in Table 1 and install serviceable tie bolts with part numbers not listed in Table 1.
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
Rolls-Royce Corporation 250-B17, -B17B, -B17C, -B17D, -B17E, -B17F, -B17F/1, -B17F/2, 250-C18, -C20, -C20B, -C20F, -C20J, -C20R, -C20R/1, -C20R/2, -C20R/4, -C20S, and -C20W series turboprop and turboshaft engines with gas producer rotor assembly tie bolt part numbers listed in Table 1, manufactured by EXTEX Ltd., Pacific Sky Supply Inc., Rolls-Royce Corporation, and Superior Air Parts Inc.
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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