Is AD 2012-17559 a recurring Airworthiness Directive?

No — AD 2012-17559 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2012-17559

Q: Which aircraft does AD 2012-17559 apply to?

AD 2012-17559 applies to Eurocopter Deutschland Gmbh — models BK117 A-1, BK117 A-3, BK117 A-4, BK117 B-1, BK117 B-2, BK117 C-1, BK117 C-2, BO-105LS A-3. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2012-17559 · 2012-07-23 · airframe

Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 (all versions) and BO-105LS A-3 helicopters. This AD requires inspecting the tail rotor pitch link spherical bearing for proper swaging. This AD is prompted by a report of a tail rotor pitch link with a spherical bearing that had migrated out of the bearing bore. The actions specified by this AD are intended to prevent failure of the tail rotor pitch link and subsequent loss of control of the helicopter.

Which aircraft AD 2012-17559 applies to

MakesEurocopter Deutschland Gmbh

ModelsBK117 A-1, BK117 A-3, BK117 A-4, BK117 B-1, BK117 B-2, BK117 C-1, BK117 C-2, BO-105LS A-3, BK117, BO-105

Part-conditional — 117-31821, 117-31822, B642M1018101.

Applies only to tail rotor pitch links with a serial number listed in Appendix 1 of Able Engineering & Component Services (Able) Alert Service Bulletin (ASB) No. 2012-001, Revision IR, dated March 7, 2012.

Whether AD 2012-17559 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 2012-17559 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.