Is AD 99-24-01 a recurring Airworthiness Directive?

Yes — AD 99-24-01 requires a repetitive inspection every 1000 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 99-24-01 apply to?

AD 99-24-01 applies to Rolls-Royce — models Tay 620-15, Tay 650-15, Tay 651-54, Tay. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-24-01

recurring

Official AD 99-24-01 · FR doc 99-29825 · 1999-11-17 · turbine engine

Airworthiness Directives; Rolls-Royce plc Tay 620-15, Tay 650-15, and Tay 651-54 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Rolls-Royce plc Tay 620-15, Tay 650-15, and Tay 651-54 series turbofan engines, that requires initial and repetitive visual inspections of the emergency fuel shutoff cable for broken strands or failed cables, and, if necessary, replacement with serviceable parts. This amendment is prompted by reports of broken strands and failed emergency fuel shutoff cables. The actions specified by this AD are intended to prevent emergency fuel shutoff cable failure, which could result in the non-operation of the emergency fuel shut-off system in the event of a low pressure shaft failure.

Repetitive inspection. Re-inspect every 1000 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 99-24-01 applies to

MakesRolls-Royce

ModelsTay 620-15, Tay 650-15, Tay 651-54, Tay

Installed on but not limited to Fokker F.28 Mark 0070/0100 series aircraft, and Boeing 727 series aircraft modified with STC SA8472SW (Tay 651-54).

Whether AD 99-24-01 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 99-24-01 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.