AD 2018-22-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Safran | Helicopter | Airworthiness Directives; Safran Helicopter Engines, S.A., Turboshaft Engines |
Unsafe Condition
Excessive turbine blade vibration may lead to progressive crack initiation on the rear face of the affected turbine wheel, which could result in an un-commanded engine in-flight shut-down and/or release of high energy debris, with consequent damage to, and/or reduced control of, the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the rear face of the 3rd-stage turbine wheel, and depending on findings, accomplish applicable corrective action(s).
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
Safran Helicopter Engines, ASTAZOU XIV B and H model engines with certain 3rd-stage turbine wheels installed.
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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