Is AD 2013-20-05 a recurring Airworthiness Directive?

No — AD 2013-20-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2013-20-05 apply to?

AD 2013-20-05 applies to Bell — models 407. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2013-20-05

one-time

Official AD 2013-20-05 · FR doc 2013-24030 · 2013-10-31 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Bell Model 407 helicopters. This AD requires installing a placard beneath the NR/NP dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures, which were caused by excessive vibrations at certain engine speeds during steady- state operations. These actions are intended to alert pilots to avoid certain engine speeds during steady-state operations, prevent failure of the third stage engine turbine, engine power loss, and subsequent loss of control of the helicopter.

Which aircraft AD 2013-20-05 applies to

MakesBell

Models407

Serial-conditional — narrows to serials 53000–53644.

Whether AD 2013-20-05 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 2013-20-05 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.