Is AD 2002-01-12 a recurring Airworthiness Directive?

No — AD 2002-01-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2002-01-12 apply to?

AD 2002-01-12 applies to General Electric — models GE90-76B, GE90-77B, GE90-85B, GE90-90B, GE90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2002-01-12

one-time

Official AD 2002-01-12 · FR doc 02-1453 · 2002-01-22 · turbine engine

Airworthiness Directives; General Electric Company GE90 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), that is applicable to General Electric Company (GE) GE90 series turbofan engines. This amendment requires removing from service high pressure turbine (HPT) interstage seals, identified by GE as the pre-life- improved rotor (pre-LIR) configuration, and installing a new design, identified by GE as the life improved rotor (LIR) configuration seal. This amendment also requires a new lower life limit for the LIR configuration seal. This amendment is prompted by an uncontained engine failure which occured during a factory development engine ground test. The actions specified by this AD are intended to prevent failure of the HPT interstage seal that could result in an uncontained engine failure and damage to the airplane.

Which aircraft AD 2002-01-12 applies to

MakesGeneral Electric

ModelsGE90-76B, GE90-77B, GE90-85B, GE90-90B, GE90

Part-conditional — 1711M20P08, 1711M20P14, 1711M20P16, 1711M20P17, 1847M96P02.

Applies to GE90-76B/-77B/-85B/-90B engines with HPT interstage seal P/N 1711M20P08, 1711M20P14, 1711M20P16, or 1711M20P17 installed; requires replacement with a serviceable seal at next shop-visit piece-part exposure, not to exceed 4,800 CSN (P/N08/16/17, and P/N14 on -76B/-77B) or 2,800 CSN (P/N14 on -85B/-90B), or by December 31, 2006, whichever is earlier, and prohibits future installation of these P/Ns. Establishes a reduced cyclic life limit of 3,500 CSN for HPT interstage seal P/N 1847M96P02.

Whether AD 2002-01-12 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 2002-01-12 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.