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Airworthiness Directive 2001-04-12

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Official AD 2001-04-12 · FR doc 01-5166 · 2001-03-05 · airframe

Airworthiness Directives; Eurocopter France Model EC120B Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for Eurocopter France Model EC120B helicopters. This action requires visually checking the engine to main gearbox coupling tube assembly (tube) for a crack and replacing any cracked tube. This amendment is prompted by a report of a crack detected on a tube. The actions specified by this AD are intended to prevent a tube failure, loss of engine drive, and a subsequent forced landing.

Which aircraft AD 2001-04-12 applies to

MakesEurocopter

Cross-reference boilerplate only; model list precedes excerpt and was not captured. Requires, within 5 hours TIS and thereafter every 5 hours TIS, a visual check inside the main gearbox (MGB) of a tube (cylindrical casing area near the MGB attachment fitting) for cracks, replacing any cracked tube before further flight; per Eurocopter France Service Bulletin 05-003, dated July 20, 2000. Equivalent to French DGAC AD 2000-176-004(A) R1.

Whether AD 2001-04-12 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 2001-04-12 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.