Is AD 2011-21-11 a recurring Airworthiness Directive?

No — AD 2011-21-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2011-21-11 apply to?

AD 2011-21-11 applies to Eurocopter — models EC225LP, EC225. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-21-11

one-time

Official AD 2011-21-11 · FR doc 2011-27680 · 2011-10-27 · airframe

Airworthiness Directives; Eurocopter France (Eurocopter) Model EC225LP Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for the Eurocopter Model EC225LP helicopters. This AD requires inspecting the side mount of the pilot and copilot seats to determine if any floor attachment screw, nut, or washer is missing. If a screw, nut, or washer is missing, this AD also requires installing airworthy parts. This AD is prompted by a report that some of the floor attachment screws and nuts under the pilot and co-pilot seats were missing. Further investigation has shown that some of the cup washers that need to be used in installing countersunk head screws that attach the pilot and co-pilot seat frame to the floor were missing. A missing floor attachment screw, washer, or nut, if not detected, could reduce the strength of the seat attachment. The actions specified in this AD are intended to detect a missing floor attachment screw, washer, or nut and help prevent detachment of the seat from the floor during an emergency landing.

Which aircraft AD 2011-21-11 applies to

MakesEurocopter

ModelsEC225LP, EC225

Part-conditional — 052010032000D61091, 704A41120116, 332V08-0180-00.

Applies to helicopters with an airworthiness certificate issued before December 15, 2009, with FISHER H140 pilot and co-pilot seats P/N 052010032000D61091, Eurocopter P/N 704A41120116, or Eurocopter co-pilot seat P/N 332V08-0180-00, installed.

Whether AD 2011-21-11 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 2011-21-11 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.