Is AD 2021-11392 a recurring Airworthiness Directive?

No — AD 2021-11392 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-11392 apply to?

AD 2021-11392 applies to Airbus Helicopters Deutschland Gmbh — models MBB-BK 117 D-2, MBB-BK 117. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-11392

one-time

AD 2021-11392 · 2021-06-01 · airframe

Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-2 helicopters. This AD was prompted by a report of a broken Titanium (Ti) bolt. This AD requires removing certain Ti-bolts from service and prohibits installing these Ti-bolts in a critical area. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-11392 applies to

MakesAirbus Helicopters Deutschland Gmbh

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

Part-conditional — EN3740-060022F.

Applies to helicopters with a Titanium (Ti) bolt part number EN3740-060022F marked with manufacturer monogram "D" or with an illegible manufacturer monogram, installed on the aft connection of the tail rotor ball bearing control.

Whether AD 2021-11392 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 2021-11392 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.