Is AD 2004-07-13 a recurring Airworthiness Directive?

No — AD 2004-07-13 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-07-13 apply to?

AD 2004-07-13 applies to General Electric — models CF6-80C2A5F, CF6-80C2B5F, CF6-80C2B7F, CF6-80C2D1F, CF6-80C2. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-07-13

one-time

Official AD 2004-07-13 · FR doc 04-7235 · 2004-04-01 · turbine engine

Airworthiness Directives; General Electric Company CF6-80C2 Series Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CF6-80C2 series turbofan engines. This AD requires replacing certain high pressure turbine (HPT) stage 1 disks at or before reaching a new reduced life cycle limit. This AD is prompted by an updated low-cycle-fatigue (LCF) analysis of the HPT stage 1 disk. We are issuing this AD to prevent LCF cracking and failure of the HPT stage 1 disk due to exceeding the life limit, which could result in an uncontained engine failure and damage to the airplane.

Which aircraft AD 2004-07-13 applies to

MakesGeneral Electric

ModelsCF6-80C2A5F, CF6-80C2B5F, CF6-80C2B7F, CF6-80C2D1F, CF6-80C2

Part-conditional — 1531M84G10, 1531M84G12.

Applies only to engines with high pressure turbine (HPT) stage 1 disks, P/N 1531M84G10 or 1531M84G12, installed.

Whether AD 2004-07-13 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 2004-07-13 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.