AD 2004-17-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Canada PW206A and PW206E | Airworthiness Directives; Pratt & Whitney Canada PW206A and PW206E Turboshaft Engines |
Unsafe Condition
Reports of engine shutdowns and emergency landings due to severe vibration, resulting in exhaust gases escaping from the engine-to-exhaust nozzle interface, thereby triggering in-flight engine fire warnings. The actions are intended to prevent turbine blade axial shift, which could cause high levels of vibration, loss of engine torque, in-flight engine shutdown, and loss of the airframe exhaust duct.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform initial and repetitive borescope inspections of compressor turbine and power turbine blades for blade axial shift. Replace blade retaining rivets and certain rotor air seals as terminating action for the repetitive borescope inspections.
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Compliance Time
Within 25 flight hours accumulated, or 30 days after the effective date of this AD, whichever occurs earlier.
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Affected Aircraft
Pratt & Whitney Canada PW206A and PW206E turboshaft engines installed on, but not limited to, MD Helicopters, Inc. Model MD-900 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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