Is AD 2011-21-05 a recurring Airworthiness Directive?

No — AD 2011-21-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2011-21-05 apply to?

AD 2011-21-05 applies to Aviointeriors S.P.A. — models 12M. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-21-05

one-time

Official AD 2011-21-05 · FR doc 2011-25800 · 2011-10-12 · appliance

Airworthiness Directives; Aviointeriors S.p.A. Passenger Seat 12M Series, Installed on But Not Limited to ATR Model ATR42 Airplanes and Model ATR72 Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Which aircraft AD 2011-21-05 applies to

MakesAviointeriors S.P.A.

Models12M

Part-conditional — 313033000000, 313033100000.

Applies to Aviointeriors 12M()()-()()()()()() passenger seats, all part numbers, equipped with backrest P/N 313033000000 or 313033100000 per Vendor Service Bulletin 12M/F68-06 Revision 1; installed on, but not limited to, ATR42-200/-300/-320/-500 and ATR72-101/-201/-102/-202/-211/-212/-212A airplanes.

Whether AD 2011-21-05 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 2011-21-05 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.