Airworthiness Directive 2016-04-14
one-timeAirworthiness Directives; Turbomeca S.A. Turboshaft Engines
What this AD requires
We are adopting a new airworthiness directive (AD) for certain Turbomeca S.A. Arriel 1E2 turboshaft engines. This AD requires removing the tachometer box on affected engines. This AD was prompted by reports of uncommanded in-flight shutdowns (IFSDs). We are issuing this AD to prevent failure of the tachometer box, which could lead to failure of the engine, IFSD, and loss of control of the helicopter.
Which aircraft AD 2016-04-14 applies to
Applies only to engines with tachometer boxes P/N 9580116170 (all S/Ns), P/N 9580116260 (all S/Ns), P/N 9580116900 (all S/Ns), P/N 9580117110 (all S/Ns), or P/N 9580117550 (S/N 1499 and below with or without suffix letters, and S/N 1500 and above without suffix letters 'EL') that also have installed electrical connectors labeled P10106, P10098, and P10108; or P11F, P13F, and P15F.
Whether AD 2016-04-14 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:
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.