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Airworthiness Directive 2014-07-51

recurring
Official AD 2014-07-51 · FR doc 2014-18298 · 2014-08-05 · airframe

Airworthiness Directives; AgustaWestland S.p.A. Helicopters

What this AD requires

We are publishing a new airworthiness directive (AD) for certain AgustaWestland S.p.A. Model AB139 and AW139 helicopters. This AD requires repetitively inspecting the Main Rotor (M/R) Rotating Scissors for play of the Lower Half Scissor Spherical Bearing (bearing) and removing the bearing if there is play beyond allowable limits. This AD also requires removing all affected bearings. This AD is prompted by reports of certain bearings dislodging from certain M/R Rotating Scissors. These actions are intended to detect excessive play of the bearing and prevent failure of the M/R Rotating Scissors and subsequent loss of control of the helicopter.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2014-07-51 applies to

MakesAgusta
ModelsAB139, AW139
Part-conditional — 3G6230A00733, 3G6230V00654.

Applies to helicopters with Main Rotor (M/R) Rotating Scissors P/N 3G6230A00733: (1) with S/Ns listed in Table 1 of AgustaWestland Bollettino Tecnico No. 139-368 on which the Lower Half Scissors Spherical Bearing P/N 3G6230V00654 was not replaced; or (2) on which that bearing was replaced with a bearing bearing an S/N listed in Table 2 of BT 139-368.

Whether AD 2014-07-51 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 2014-07-51 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.