Is AD 99-03-09 a recurring Airworthiness Directive?

No — AD 99-03-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-03-09 apply to?

AD 99-03-09 applies to Allison Engine Company — models AE 2100A, AE 2100C, AE 2100D3, AE 2100. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-03-09

one-time

Official AD 99-03-09 · FR doc 99-2494 · 1999-02-04 · turboprop engine

Airworthiness Directives; Allison Engine Company, Inc. AE 2100A, AE 2100C, and AE 2100D3 Series Turboprop Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Allison Engine Company, Inc. AE 2100A, AE 2100C, and AE 2100D3 series turboprop engines. This action requires removing from service affected turbine wheels prior to exceeding new, reduced cyclic life limits. This amendment is prompted by the results of a refined life analysis. The actions specified in this AD are intended to prevent an uncontained turbine wheel failure, which could result in damage to the aircraft.

Which aircraft AD 99-03-09 applies to

MakesAllison Engine Company

ModelsAE 2100A, AE 2100C, AE 2100D3, AE 2100

Part-conditional — 23053358, 23059878, 23062373, 23062376, 23063462, 23064473, 23064474, 23064822.

Applies only to engines with turbine wheels P/Ns 23053358, 23059878, 23062373, 23062376, 23063462, 23064473, 23064474, 23064822, 23065891, 23065892, 23066791, and 23068072 installed. Installed on but not limited to Saab Aircraft AB 2000, Industri Pesawat Terbang Nusantara (IPTN) Model N-250-100, and Lockheed Martin Model 382J (Military C-130J) series aircraft.

Whether AD 99-03-09 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 99-03-09 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.