AD 2013-05-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Corrosion detected in affected N2 sensor harnesses, which could lead to inadvertent activation of the 65% N1 backup control mode, resulting in N2 speed fluctuation, significant power loss, and emergency landing of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace certain serial number (S/N) N2 sensor harnesses, part number (P/N) 0 301 52 001 0, with harnesses eligible for installation within specified flight hours or before the next flight after the effective date of this AD, depending on the engine configuration.
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Compliance Time
Within 10 or 50 flight hours after December 7, 2011, or before the next flight after the effective date of this AD, whichever occurs later.
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Affected Aircraft
All Turbomeca S.A. Makila 1A2 turboshaft engines with an N2 sensor harness, P/N 0 301 52 001 0, installed, with S/N 242 through 339, inclusive, or S/N 691 through 705, inclusive, 707 through 728, inclusive, or 813 through 844, inclusive.
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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