Is AD 2014-21-08 a recurring Airworthiness Directive?

No — AD 2014-21-08 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2014-21-08 apply to?

AD 2014-21-08 applies to Bombardier, Inc. — models BD-700-1A11, BD-700. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2014-21-08

one-time

Official AD 2014-21-08 · FR doc 2014-25101 · 2014-10-28 · airframe

Airworthiness Directives; Bombardier, Inc. Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model BD-700-1A11 airplanes. This AD was prompted by a report that certain lanyards for the passenger oxygen masks are longer than the specified length, possibly leading to inactive oxygen masks in an emergency. This AD requires replacement of certain oxygen mask lanyards. We are issuing this AD to detect and correct lanyards of incorrect length, which might not activate the flow of oxygen in an emergency, resulting in injury to passengers.

Which aircraft AD 2014-21-08 applies to

MakesBombardier, Inc.

ModelsBD-700-1A11, BD-700

Applies only to airplanes modified by FAA Supplemental Type Certificate (STC) ST02140NY, issued October 14, 2005, or FAA STC ST02033NY, issued December 2, 2004.

Whether AD 2014-21-08 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 2014-21-08 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.