Is AD 99-06-16 a recurring Airworthiness Directive?

No — AD 99-06-16 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-06-16 apply to?

AD 99-06-16 applies to Cfm International — models CFM56-5, CFM56. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-06-16

one-time

Official AD 99-06-16 · FR doc 99-6555 · 1999-03-22 · turbine engine

Airworthiness Directives; CFM International CFM56-5 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to CFM International CFM56-5 series turbofan engines, that reduces the low cycle fatigue (LCF) retirement lives for certain high pressure turbine rotor (HPTR) front air seals, and provides a drawdown schedule for those affected parts with reduced LCF retirement lives. This amendment is prompted by results of a refined life analysis performed by the manufacturer that revealed minimum calculated LCF lives significantly lower than the published LCF retirement lives. The actions specified by this AD are intended to prevent a LCF failure of the HPTR front air seal, which could result in an uncontained engine failure and damage to the aircraft.

Which aircraft AD 99-06-16 applies to

MakesCfm International

ModelsCFM56-5, CFM56

Installed on but not limited to Airbus A319 and A320 series aircraft; applies to each identified engine regardless of modification, alteration, or repair status.

Whether AD 99-06-16 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 99-06-16 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.