Is AD 2013-16-20 a recurring Airworthiness Directive?

No — AD 2013-16-20 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2013-16-20 apply to?

AD 2013-16-20 applies to Eurocopter Deutschland — models BK117 C-2, BK117. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2013-16-20

one-time

Official AD 2013-16-20 · FR doc 2013-19443 · 2013-08-23 · airframe

Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for ECD Model MBB-BK 117 C-2 helicopters. This AD requires inspecting the rigging of the power-boosted control system and, if there is a nonparallel gap between the rigging wedges and the inner sleeves, performing a rigging procedure. This AD was prompted by the discovery, during rigging of the main rotor controls, of movement of the longitudinal main rotor actuator piston after shut-down of the external pump drive. Such movement could cause incorrect rigging results. The actions of this AD are intended to prevent incorrect rigging results, which could impair freedom of movement of the upper controls and subsequent reduced control of the helicopter.

Which aircraft AD 2013-16-20 applies to

MakesEurocopter Deutschland

ModelsBK117 C-2, BK117

Whether AD 2013-16-20 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 2013-16-20 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.