Is AD 2001-04-06 a recurring Airworthiness Directive?

No — AD 2001-04-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2001-04-06 apply to?

AD 2001-04-06 applies to Cfm International — models CFM56-3, CFM56-3B, CFM56-3C, CFM56. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2001-04-06

one-time

Official AD 2001-04-06 · FR doc 01-4216 · 2001-02-28 · turbine engine

Airworthiness Directives; CFM International, S.A. CFM56-3, -3B, and -3C Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to CFM International, S.A. CFM56-3, -3B, and -3C series turbofan engines. This amendment requires that use of certain lubricants no longer on the manufacturer's approved list be discontinued. In addition, this amendment requires a one-time fan disk dovetail wear measurement, and if wear exceeds certain limits, requires an ultrasonic inspection for cracks in the fan disk, and, if necessary, removal from service of fan disks and replacement with serviceable parts. This amendment is prompted by reports of fan disk heavy wear and cracks. The actions specified by this amendment are intended to prevent fan disk failure, which could result in an uncontained engine failure and damage to the aircraft.

Which aircraft AD 2001-04-06 applies to

MakesCfm International

ModelsCFM56-3, CFM56-3B, CFM56-3C, CFM56

Whether AD 2001-04-06 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 2001-04-06 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.