Is AD 2012-02-09 a recurring Airworthiness Directive?

No — AD 2012-02-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-02-09 apply to?

AD 2012-02-09 applies to The Boeing Company — models 737-100, 737-200, 737-200C, 737-300, 737. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-02-09

one-time

Official AD 2012-02-09 · FR doc 2012-2004 · 2012-02-07 · 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 737-100, -200, -200C, and -300 series airplanes. This AD was prompted by a report from the airplane manufacturer that airplanes were assembled with air distribution ducts in the environmental control system (ECS) wrapped with Boeing Material Specification (BMS) 8-39 or Aeronautical Materials Specifications (AMS) 3570 polyurethane foam insulation, a material with fire-retardant properties that deteriorate with age. This AD requires reworking certain air distribution ducts in the ECS. We are issuing this AD to prevent ignition of the BMS 8-39 or AMS 3570 polyurethane foam insulation on the duct assemblies of the ECS due to a potential electrical arc, which could start a small fire and lead to a larger fire that may spread throughout the airplane through the ECS.

Which aircraft AD 2012-02-09 applies to

MakesThe Boeing Company

Models737-100, 737-200, 737-200C, 737-300, 737

Applies to airplanes identified in Boeing Service Bulletin 737-21A1132, Revision 3, dated February 16, 2011.

Whether AD 2012-02-09 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 2012-02-09 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.