AD 2006-06-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | Arriel 1B | Airworthiness Directives; Turbomeca Arriel 1B, 1D, and 1D1 Turboshaft Engines |
Unsafe Condition
This AD results from one instance of a fractured 2nd stage turbine blade followed by an uncommanded engine shutdown. We are issuing this AD to detect and prevent perforation of the 2nd stage nozzle guide vanes (NGV2) that could cause fracture of a turbine blade that could result in an uncommanded engine in-flight shutdown on a single-engine helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the thickness of the material on each NGV2 using Turbomeca Mandatory Service Bulletin (MSB) No. A292 72 0231, Update No. 5, dated July 22, 2004. Replace the NGV2 if the vane thickness is below the defined criteria.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next shop visit or the next accessibility of the NGV2 after the effective date of this AD, whichever occurs first, but no later than December 31, 2006, unless the actions have already been done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca Arriel 1B, 1D, and 1D1 turboshaft engines, modified to the TU 202 standard, installed on, but not limited to, Eurocopter France AS350BA, AS350B, AS350B1, and AS350B2 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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