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Airworthiness Directive 2016-22-10

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Official AD 2016-22-10 · FR doc 2016-26184 · 2016-11-01 · turboshaft engine

Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Turbomeca S.A. Arriel 1, 1A, 1A1, 1A2, 1B, 1B2, 1C, 1C1, 1C2, 1D, 1D1, 1E, 1E2, 1K1, 1S, and 1S1 turboshaft engines. This AD requires removing the centrifugal impeller and replacing with a part eligible for installation. This AD was prompted by an anomaly that occurred during the grinding operation required by modification TU376, which increases the clearance between the rear curvic coupling of the centrifugal impeller and the fuel injection manifold. We are issuing this AD to prevent failure of the centrifugal impeller, uncontained centrifugal impeller release, damage to the engine, and damage to the helicopter.

Which aircraft AD 2016-22-10 applies to

MakesTurbomeca S.A.
ModelsArriel 1, Arriel 1A, Arriel 1A1, Arriel 1A2, Arriel 1B, Arriel 1B2, Arriel 1C, Arriel 1C1, Arriel 1C2, Arriel 1D, Arriel 1D1, Arriel 1E, Arriel 1E2, Arriel 1K1, Arriel 1S, Arriel 1S1, Arriel

Applies only to engines with modification TU376 installed (increases clearance between rear curvic coupling of centrifugal impeller and fuel injection manifold).

Whether AD 2016-22-10 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 2016-22-10 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.