Is AD 2012-18-05 a recurring Airworthiness Directive?

No — AD 2012-18-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-18-05 apply to?

AD 2012-18-05 applies to Boeing — models DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-18-05

one-time

Official AD 2012-18-05 · FR doc 2012-21838 · 2012-09-06 · 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 DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9- 50 series airplanes; and Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9- 83 (MD-83), DC-9-87 (MD-87), MD-88, and MD-90-30 airplanes; equipped with center wing fuel tank and Boeing original equipment manufacturer- installed auxiliary fuel tanks. This AD was prompted by fuel system reviews conducted by the manufacturer. This AD requires adding design features to detect electrical faults and to detect a pump running in an empty fuel tank. We are issuing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

Which aircraft AD 2012-18-05 applies to

MakesBoeing

ModelsDC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, VC-9C, DC-9-32F, DC-9-33F, DC-9-34, DC-9-34F, C-9A, C-9B, DC-9-41, DC-9-51, DC-9-81, MD-81, DC-9-82, MD-82, DC-9-83, MD-83, DC-9-87, MD-87, MD-88, MD-90-30, DC-9, MD-90

Applies only to airplanes equipped with center wing fuel tanks and Boeing OEM-installed auxiliary fuel tanks; for airplanes from which the auxiliary fuel tanks have been removed, the actions specified in this AD are not required.

Whether AD 2012-18-05 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 2012-18-05 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.