Is AD 2003-20-11 a recurring Airworthiness Directive?

No — AD 2003-20-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2003-20-11 apply to?

AD 2003-20-11 applies to Eurocopter — models EC135P1, EC135P2, EC135T1, EC135T2, EC135. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2003-20-11

one-time

Official AD 2003-20-11 · FR doc 03-25592 · 2003-10-10 · airframe

Airworthiness Directives; Eurocopter Deutschland GmbH Model EC135 P1, P2, T1, and T2 Helicopters

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model EC135 P1 and EC135 T1 helicopters. That AD currently requires adding the AD or a statement to the Rotorcraft Flight Manual (RFM) informing the pilot to reduce power and land as soon as practicable if a thump-like sound followed by unusual vibration occurs during flight. That AD also requires visually inspecting the main rotor drive torque strut assembly (strut) for a crack or a break, recording the inspections in the historical or equivalent record, and re-marking and relocating the strut, as appropriate, and replacing any unairworthy strut with an airworthy strut. Also, that AD establishes life limits for certain struts and revises the life limit for other struts. This amendment retains the same requirements but adds the ECD Model EC135 P2 and EC135 T2 helicopters to the applicability and requires replacing certain life- limited struts with titanium struts. This amendment is prompted by the manufacture of a titanium strut that provides a permanent correction to the unsafe condition that led to limiting the life of other struts that have failed. The actions specified by this AD are intended to prevent failure of a strut and subsequent loss of control of the helicopter.

Which aircraft AD 2003-20-11 applies to

MakesEurocopter

ModelsEC135P1, EC135P2, EC135T1, EC135T2, EC135

Part-conditional — L633M1001 103, L633M1001 105.

Applies only to helicopters with main rotor drive torque strut assembly P/N L633M1001 103 or L633M1001 105 installed.

Whether AD 2003-20-11 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 2003-20-11 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.