Is AD 2014-03-21 a recurring Airworthiness Directive?

No — AD 2014-03-21 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2014-03-21 apply to?

AD 2014-03-21 applies to Boeing — models 727-200, 727-200F, 727. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2014-03-21

one-time

Official AD 2014-03-21 · FR doc 2014-03241 · 2014-02-24 · airframe

Airworthiness Directives; the Boeing Company Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 727-200 and 727-200F series airplanes. This AD is intended to complete certain mandated programs intended to support the airplane reaching its limit of validity (LOV) of the engineering data that support the established structural maintenance program. This AD requires a one-time inspection for cracking of the pressure floor of both main wheel wells, and related investigative and corrective actions if necessary; and modifying the pressure floor of both main wheel wells. We are issuing this AD to prevent fatigue cracking in the pressure floor of the main wheel wells, which could lead to rapid loss of cabin pressurization.

Which aircraft AD 2014-03-21 applies to

MakesBoeing

Models727-200, 727-200F, 727

Applies to airplanes with line numbers 1103 and subsequent.

Whether AD 2014-03-21 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 2014-03-21 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.