Is AD 2012-06-21 a recurring Airworthiness Directive?

No — AD 2012-06-21 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-06-21 apply to?

AD 2012-06-21 applies to Dassault Aviation — models MYSTERE-FALCON 900. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-06-21

one-time

Official AD 2012-06-21 · FR doc 2012-7372 · 2012-03-30 · airframe

Airworthiness Directives; DASSAULT AVIATION Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for all DASSAULT AVIATION Model MYSTERE-FALCON 900 airplanes. This AD was prompted by multiple reports of fuel leakage from a defective fuel high-level sensor located in the wing front spar. This AD requires inspecting to determine fuel quantity sensors part numbers and replacing of certain fuel quantity sensors with new fuel quantity sensors. We are issuing this AD to prevent internal fuel leakage with significant fuel vapors, which could result in a fire hazard.

Which aircraft AD 2012-06-21 applies to

MakesDassault Aviation

ModelsMYSTERE-FALCON 900

Applies to all serial numbers of this model.

Whether AD 2012-06-21 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 2012-06-21 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.