Is AD 06-4908 a recurring Airworthiness Directive?

Yes — AD 06-4908 requires a repetitive inspection every 1250 hours. Next-due depends on the aircraft's time in service.

Airworthiness Directive 06-4908

Q: Which aircraft does AD 06-4908 apply to?

AD 06-4908 applies to Honeywell International, Lycoming — models T5311A, T5311B, T5313B, T5317A, T5317A-1, T5317B, T53-L-11B, T53-L-11D. Serial/part conditions may narrow it to specific aircraft.

recurring

AD 06-4908 · 2006-05-31 · turboshaft engine

Airworthiness Directives; Honeywell International Inc. T5311A, T5311B, T5313B, T5317A, T5317A-1, and T5317B Series Turboshaft Engines and Lycoming Former Military T53-L-11B, T53-L-11D, T53-L-13B, T53-L-13B/D, and T53-L-703 Series Turboshaft Engines

What this AD requires

The FAA is superseding an existing airworthiness directive (AD) for AlliedSignal, Inc. T5317A-1 turboshaft engines. That AD currently requires repetitive engine fuel pump pressure tests of certain fuel control regulator assemblies to determine if both fuel pumps in the fuel control regulator assemblies are producing fuel pressure. That AD also requires replacing the fuel control regulator assembly, if necessary. This AD requires initial and repetitive visual and dimensional inspections of fuel control regulator assembly main and secondary drive shaft and pump gear splines, installed in certain fuel control regulator assemblies. This AD also expands the engine applicability, and includes certain engines installed on helicopters certified under Sec. 21.25 or 21.27 of the Code of Federal Regulations (14 CFR 21.25 or 14 CFR 21.27). This AD results from several reports of loss of fuel flow from the engine fuel control regulator assembly due to failure of both main and secondary drive shaft and pump gear splines. We are issuing this AD to prevent in-flight engine failure and forced autorotation landing.

Repetitive inspection. Re-inspect every 1250 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 06-4908 applies to

MakesHoneywell InternationalLycoming

ModelsT5311A, T5311B, T5313B, T5317A, T5317A-1, T5317B, T53-L-11B, T53-L-11D, T53-L-13B, T53-L-13B/D, T53-L-703, T53

Part-conditional — TA-2S, TA-2G, TA-2F, TA-7, TA-10.

Applies only to engines using a Goodrich Pump & Engine Control Systems (GPECS, formerly Chandler Evans Control Systems) engine fuel control regulator assembly model TA-2S, TA-2G, TA-2F, TA-7, or TA-10.

Whether AD 06-4908 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 98-22-11.

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 06-4908 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.