Is AD 01-21394 a recurring Airworthiness Directive?

No — AD 01-21394 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 01-21394 apply to?

AD 01-21394 applies to Mcdonnell Douglas — models KC-10A, KDC-10. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 01-21394

one-time

AD 01-21394 · 2001-08-27 · airframe

Airworthiness Directives; McDonnell Douglas Model DC-10 Series Airplanes, and KC-10A and KDC-10 (Military) Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to all McDonnell Douglas Model DC-10 series airplanes, and KC-10A and KDC-10 (military) airplanes, that requires certain modifications of the thrust reverser control and indication system and wiring on each engine. This amendment is prompted by a determination that the current thrust reverser systems do not adequately preclude unwanted deployment of a thrust reverser. These actions are necessary to prevent unwanted deployment of a thrust reverser, which could significantly jeopardize continued safety of flight and landing of the airplane.

Which aircraft AD 01-21394 applies to

MakesMcdonnell Douglas

ModelsKC-10A, KDC-10

certain

Whether AD 01-21394 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 01-21394 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.