Is AD 99-01-01 a recurring Airworthiness Directive?

No — AD 99-01-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-01-01 apply to?

AD 99-01-01 applies to General Electric — models CF6-80C2, CF6. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-01-01

one-time

Official AD 99-01-01 · FR doc 99-10 · 1999-01-06 · turbine engine

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

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company CF6-80C2 series turbofan engines. This action requires a one-time visual inspection to ensure the correct accessory gearbox (AGB) idler adapter inserts are installed, and, if necessary, removal of AGB idler adapters with the improper inserts. This amendment is prompted by a report of a failure of a fuel tube flange connection due to improper AGB idler adapter inserts that resulted in a high pressure fuel leak and engine fire. The actions specified in this AD are intended to identify and remove AGB idler adapters with improper inserts, which can result in an engine fire and damage to the aircraft.

Which aircraft AD 99-01-01 applies to

MakesGeneral Electric

ModelsCF6-80C2, CF6

Part-conditional — 9395M78G08, 9395M78G06.

Applies only to engines with Accessory Gearbox (AGB) idler adapter P/N 9395M78G08 that had been reworked from P/N 9395M78G06 configuration using GE CF6-80C2 Service Bulletin (SB) 72-743, dated August 25, 1994, excluding parts repaired per GE Repair Document 032-273-S1, dated April 8, 1998. Installed on but not limited to Airbus A300 and A310 series, and Boeing 747, 767, and MD-11 aircraft.

Whether AD 99-01-01 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 99-01-01 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.