Is AD 04-20411 a recurring Airworthiness Directive?

No — AD 04-20411 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 04-20411 apply to?

AD 04-20411 applies to Cfm International — models CFM56-5C2/G, CFM56-5C3/G, CFM56-5C4, CFM56. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 04-20411

one-time

AD 04-20411 · 2004-09-09 · turbine engine

Airworthiness Directives; CFM International (CFMI) CFM56-5C Series Turbofan Engines

What this AD requires

This amendment revises an existing airworthiness directive (AD) for CFMI CFM56-5C series turbofan engines. That AD currently establishes new life limits for certain high pressure turbine rotor (HPTR) front shafts, HPTR front air seals, and booster spools. This action removes the booster spool, part number (P/N) 337-005-210-0, and the HPTR front shaft, P/Ns 1498M40P03, 1498M40P05, and 1498M40P06, from the parts listed with lowered life limits in the existing AD. This amendment results from a life management review completed by the manufacturer. We are issuing this AD to prevent low-cycle fatigue (LCF) failure of certain HPTR front air seals, which could result in an uncontained engine failure and damage to the airplane.

Which aircraft AD 04-20411 applies to

MakesCfm International

ModelsCFM56-5C2/G, CFM56-5C3/G, CFM56-5C4, CFM56

Part-conditional — 1498M40P03, 1498M40P05, 1498M40P06, 1523M34P02, 1523M34P03, 1498M43P04, 337-005-210-0, 337-001-602-0.

Extracted applicability text is truncated/boilerplate ('applies to each engine identified in the preceding applicability provision'); engine identity inferred from CFM56-5C Engine Shop Manual (CFMI-TP.SM.8) part references in the compliance section, which name CFM56-5C2/G, -5C3/G, and -5C4 engines and specific HPTR/LPTR/booster-spool part numbers.

Whether AD 04-20411 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 04-20411 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.