Is AD 2012-23-14 a recurring Airworthiness Directive?

No — AD 2012-23-14 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-23-14 apply to?

AD 2012-23-14 applies to Boeing — models 737-100, 737-200, 737-200C, 737-300, 737-400, 737-500, 737. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-23-14

one-time

Official AD 2012-23-14 · FR doc 2012-28504 · 2012-12-03 · 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, -300, -400, and -500 series airplanes. This AD was prompted by a report of a crack found in the fuselage skin under the aft drain mast. This AD requires a detailed inspection for cracking and corrosion of the channel and fillers adjacent to the drain mast bolts, an inspection to determine the location of the bonding strap, a measurement of the washers under the drain mast bolts, and related investigative actions and repair if necessary. We are issuing this AD to detect and correct cracking in the fuselage skin and internal support structure, which could result in uncontrolled decompression of the airplane.

Which aircraft AD 2012-23-14 applies to

MakesBoeing

Models737-100, 737-200, 737-200C, 737-300, 737-400, 737-500, 737

Limited to airplanes identified in Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011. Installation of STC ST01219SE does not affect the ability to accomplish the required actions; a change-in-product AMOC is not necessary for airplanes with that STC installed.

Whether AD 2012-23-14 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 2012-23-14 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.