Is AD 2001-12-06 a recurring Airworthiness Directive?

Yes — AD 2001-12-06 requires a repetitive inspection every 30 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2001-12-06 apply to?

AD 2001-12-06 applies to General Electric — models CF34-1A, CF34-3A, CF34-3A1, CF34-3A2, CF34-3B, CF34-3B1, CF34. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2001-12-06

recurring

Official AD 2001-12-06 · FR doc 01-14824 · 2001-06-15 · turbine engine

Airworthiness Directives; General Electric Company (GE) CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), that is applicable to GE CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 turbofan engines with No. 5 bearing rotating air seal part number (P/N) 4019T60G01 installed. This amendment requires initial and repetitive checks of the magnetic chip detector indicators, which are located in the lubrication system for the engine bearings, and installation of an improved No. 5 bearing rotating air seal as a terminating action. This amendment is prompted by a report of the failure of a No. 5 bearing rotating air seal that led to a fire in the cavity of the low pressure turbine (LPT), overtemperature of the LPT turbine disk, and excessive turbine disk growth. The actions specified by this AD are intended to prevent No.5 bearing rotating air seal failures and possible uncontained engine failures.

Repetitive inspection. Re-inspect every 30 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2001-12-06 applies to

MakesGeneral Electric

ModelsCF34-1A, CF34-3A, CF34-3A1, CF34-3A2, CF34-3B, CF34-3B1, CF34

Part-conditional — 4019T60G01, 4019T60G03.

Requires periodic magnetic chip detector checks (interval varies by model per Table 1) and replacement of No. 5 bearing rotating air seal P/N 4019T60G01 with P/N 4019T60G03 per Table 2, to prevent air seal failure and possible uncontained engine failure.

Whether AD 2001-12-06 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 2001-12-06 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.