Is AD 2012-03-51 a recurring Airworthiness Directive?

No — AD 2012-03-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2012-03-51

Q: Which aircraft does AD 2012-03-51 apply to?

AD 2012-03-51 applies to Aero Union Corporation, Central Air Service, Inc., Evergreen Air Center, Hawkins And Powers Aviation, Inc., Minden Air Corp, Neptune Aviation Service, Inc., Usda Forest Service — models SP-2H, P2V-7, HP-P2V-7, P2V-5F, SP-2E, P2V. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2012-03-51 · FR doc 2012-3618 · 2012-02-16 · airframe

Airworthiness Directives; Airplanes Originally Manufactured by Lockheed for the Military as P2V Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain airplanes originally manufactured by Lockheed for the military as P2V airplanes. This emergency AD was sent previously to all known U.S. owners and operators of these airplanes. This AD requires cleaning of the forward lower spar cap between wing stations 40 and 84.5 (right and left), and doing a detailed inspection for cracks, working fasteners, and other anomalies, including surface damage in the form of a nick, gouge, or corrosion; and repairing if necessary. This AD was prompted by a report of a significant crack in the principle wing structure. We are issuing this AD to detect and correct cracks, working fasteners, and other anomalies in the principle wing structure, which could cause significant loss of structural integrity of the wing.

Which aircraft AD 2012-03-51 applies to

MakesAero Union CorporationCentral Air Service, Inc.Evergreen Air CenterHawkins And Powers Aviation, Inc.Minden Air CorpNeptune Aviation Service, Inc.Usda Forest Service

ModelsSP-2H, P2V-7, HP-P2V-7, P2V-5F, SP-2E, P2V

Applies to specific operators' Neptune-family airplanes as listed: Aero Union Corporation, Central Air Service, Evergreen Air Center, Minden Air Corp, and Neptune Aviation Service operate Model SP-2H (P2V-7); Hawkins and Powers Aviation operates Model HP-P2V-7; USDA Forest Service (type certificate previously held by U.S. Department of Agriculture) operates Model P2V-5F (SP-2E).

Whether AD 2012-03-51 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 2012-03-51 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.