Is AD 2012-20-01 a recurring Airworthiness Directive?

Yes — AD 2012-20-01 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2012-20-01 apply to?

AD 2012-20-01 applies to Boeing — models 737-100, 737-200, 737-200C, 737. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-20-01

recurring

Official AD 2012-20-01 · FR doc 2012-24280 · 2012-10-05 · 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, and -200C series airplanes. This AD was prompted by a report of a severed upper butt strap, and cracks in the forward skin and bonded doubler, on one airplane. This AD requires repetitive inspections for cracks and a chemical spot test in the area of station (STA) 908, and related investigative and corrective actions, if necessary. For certain airplanes, this AD requires an inspection and modification. We are issuing this AD to prevent cracks at the adjacent mating skins (forward and aft), which could initiate just above stringers S-4R and S-4L; and could grow and result in a decompression event.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2012-20-01 applies to

MakesBoeing

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

Limited to airplanes identified in Boeing Special Attention Service Bulletin 737-53-1313, dated November 3, 2011.

Whether AD 2012-20-01 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 2012-20-01 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.