Is AD 2001-20-04 a recurring Airworthiness Directive?

No — AD 2001-20-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2001-20-04 apply to?

AD 2001-20-04 applies to Agusta — models A109E, A109. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2001-20-04

one-time

Official AD 2001-20-04 · FR doc 01-24623 · 2001-10-03 · airframe

Airworthiness Directives; Agusta S.p.A. Model A109E Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109E helicopters that requires modifying the passenger compartment sliding doors by installing certain locking mechanism kits. This amendment is prompted by accidental opening of a passenger compartment sliding door (door) in flight due to a door locking mechanism that is too easy to accidentally open. The actions specified by this AD are intended to prevent accidental opening of a door in flight and subsequent loss of objects that could damage the rotor system.

Which aircraft AD 2001-20-04 applies to

MakesAgusta

ModelsA109E, A109

Serial-conditional — narrows to serials ?–11099.

Applies to Model A109E helicopters with serial number up to and including 11099 (open-ended lower bound).

Whether AD 2001-20-04 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 2001-20-04 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.