Is AD 2021-13127 a recurring Airworthiness Directive?

No — AD 2021-13127 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-13127 apply to?

AD 2021-13127 applies to Airbus Helicopters Deutschland — models MBB-BK 117 D-2, MBB-BK 117. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-13127

one-time

AD 2021-13127 · 2021-06-24 · airframe

Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-2 helicopters. This AD was prompted by a short circuit in a yaw trim actuator connector that occurred during production electrical tests. This AD requires replacing certain wire harness trim connector backshells (backshells), as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-13127 applies to

MakesAirbus Helicopters Deutschland

ModelsMBB-BK 117 D-2, MBB-BK 117

Applies to helicopters having an affected part as defined in EASA AD 2019-0198, dated August 15, 2019.

Whether AD 2021-13127 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 2021-13127 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.