Is AD 96-19-01 a recurring Airworthiness Directive?

Yes — AD 96-19-01 requires a repetitive inspection every 25 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 96-19-01 apply to?

AD 96-19-01 applies to Allison — models 250-B15G, 250-B17F, 250-B17F/1, 250-B17F/2, 250-C20, 250-C20B, 250-C20F, 250-C20J. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 96-19-01

recurring

Official AD 96-19-01 · FR doc 96-22922 · 1996-09-11 · turboshaft engine

Airworthiness Directives; Allison 250 Series Turbine Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Allison 250 series turbine engines. This action requires initial and repetitive visual inspections of all engine filters for metal particles resulting from premature wear of two bearings produced under Parts Manufacture Approval (PMA) by Superior Air Parts, Inc. In addition, this AD requires replacement of those bearings with bearings that incorporate improved retainers, which constitutes terminating action to the inspection requirements of this AD. This amendment is prompted by a report of a failure during a ground test of an engine with bearings manufactured by Superior Air Parts, Inc. The actions specified in this AD are intended to prevent bearing failure due to bearing separator instability, which can result in subsequent turbine and engine failure.

Repetitive inspection. Re-inspect every 25 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 96-19-01 applies to

MakesAllison

Models250-B15G, 250-B17F, 250-B17F/1, 250-B17F/2, 250-C20, 250-C20B, 250-C20F, 250-C20J, 250-C20S, 250-C20W, 250-R, 250-C20R/1, 250-C20R/2, 250-C20R/4, 250-C28B, 250-C28C, 250-C30, 250-C30P, 250-C30M, 250-C30G, 250

Part-conditional — A6871505, A23007152.

Applies only to engines with Superior Air Parts, Inc. PMA bearings P/N A6871505 or P/N A23007152 installed. Installations include both helicopter (turboshaft) and fixed-wing (turboprop conversion) applications.

Whether AD 96-19-01 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 96-19-01 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.