Is AD 2009-11-10 a recurring Airworthiness Directive?

No — AD 2009-11-10 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2009-11-10 apply to?

AD 2009-11-10 applies to Eurocopter — models EC135. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2009-11-10

one-time

Official AD 2009-11-10 · FR doc E9-12319 · 2009-05-28 · airframe

Airworthiness Directives; Eurocopter Deutschland GmbH Model EC135 Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland GmbH (Eurocopter) Model EC135 helicopters. This AD results from a report of abnormal main rotor blade vibrations on a Eurocopter Model EC135 helicopter. This AD also results from mandatory continuing airworthiness information (MCAI) issued by the European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community. The MCAI states that an operator reported unusual vibrations during the start phase of the main rotor blade on one helicopter. The vibrations stopped after the application of torque. Subsequent maintenance personnel found that six of the eight attachment screws of the lower hub-shaft bearing support were loose. This condition was discovered in two additional helicopters. Loose screws in the bearing support, if not detected and corrected, could result in abnormal main rotor blade vibrations and subsequent damage to the main transmission.

Which aircraft AD 2009-11-10 applies to

MakesEurocopter

ModelsEC135

Serial-conditional — narrows to serials 0001–1420, 1500–1749.

Serial range given (0001-1420 and 1500-1749) is for the main transmission installed on the helicopter, not the helicopter airframe serial number; applies only to EC135 helicopters with a main transmission in that serial range installed.

Whether AD 2009-11-10 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 2009-11-10 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.