Is AD 2014-16387 a recurring Airworthiness Directive?

No — AD 2014-16387 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2014-16387

Q: Which aircraft does AD 2014-16387 apply to?

AD 2014-16387 applies to Airbus Helicopters — models MBB-BK117 A-3, MBB-BK117 A-4, MBB-BK117 B-1, MBB-BK117 C-2, MBB-BK117. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2014-16387 · 2014-07-15 · airframe

Airworthiness Directives; Airbus Helicopters Deutschland GmbH (Airbus Helicopters) (Type Certificate Previously Held by Eurocopter Deutschland GmbH) Helicopters

What this AD requires

We are publishing a new airworthiness directive (AD) for Airbus Helicopters Model MBB-BK 117 A-3, MBB-BK 117 A-4, MBB-BK 117 B- 1, and MBB-BK 117 C-2 helicopters with a certain Metro Aviation, Inc. (Metro), vapor-cycle air conditioning kit pulley (pulley) installed, which was sent previously to all known U.S. owners and operators of these helicopters. This AD supersedes AD 2013-12-06, which required inspecting the pulley for looseness and properly installed lockwire and re-installing the pulley. Since we issued AD 2013-12-06, we received a report of a possible design and manufacturing deficiency in some pulleys wherein they did not have sufficient thread depth, allowing the pulley to detach from the rotor brake disc. This AD requires inspecting each pulley attaching bolt hole to determine if there is sufficient depth of the threads and either removing the pulley if the depth is insufficient or installing dual locking tabs under each pulley attaching bolt if the depth is sufficient. These actions are intended to prevent the pulley from detaching, resulting in damage to the tail rotor (T/R) driveshaft, and subsequent loss of control of the helicopter.

Which aircraft AD 2014-16387 applies to

MakesAirbus Helicopters

ModelsMBB-BK117 A-3, MBB-BK117 A-4, MBB-BK117 B-1, MBB-BK117 C-2, MBB-BK117

Part-conditional — 30001.

Applies only to helicopters with a Metro Aviation, Inc. vapor-cycle air conditioning kit pulley P/N 30001 installed in accordance with STC No. SH3880SW.

Whether AD 2014-16387 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 2013-12-06.

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 2014-16387 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.