Is AD 2011-12-12 a recurring Airworthiness Directive?

Yes — AD 2011-12-12 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2011-12-12 apply to?

AD 2011-12-12 applies to Boeing — models MD-90-30, MD-90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-12-12

recurring

Official AD 2011-12-12 · FR doc 2011-14339 · 2011-06-17 · airframe

Airworthiness Directives; The Boeing Company Model MD-90-30 Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires a detailed inspection to detect distress and existing repairs to the leading edge structure of the vertical stabilizer at the splice at Station Zfs=52.267; repetitive inspections for cracking in the front spar cap forward flanges of the vertical stabilizer, and either the aft flanges or side skins; repetitive inspections for loose and missing fasteners; and related investigative and corrective actions if necessary. This AD was prompted by reports of cracked vertical stabilizer skin, a severed front spar cap, elongated fastener holes at the leading edge of the vertical stabilizer, and cracked front spar web and front spar cap bolt holes in the vertical stabilizer. We are issuing this AD to detect and correct such cracking damage, which could result in the structure being unable to support limit load, and could lead to the loss of the vertical stabilizer.

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 2011-12-12 applies to

MakesBoeing

ModelsMD-90-30, MD-90

Applies only to airplanes identified in Boeing Alert Service Bulletin MD90-55A014, dated June 24, 2010.

Whether AD 2011-12-12 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 2011-12-12 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.