Is AD 99-15-04 a recurring Airworthiness Directive?

Yes — AD 99-15-04 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 99-15-04 apply to?

AD 99-15-04 applies to Lewis — models PA-46-310P, PA-46-350P, PA-46. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-15-04

recurring

Official AD 99-15-04 · FR doc 99-17678 · 1999-07-13 · appliance

Airworthiness Directives; The New Piper Aircraft, Inc. Models PA- 46-310P and PA-46-350P Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to all The New Piper Aircraft, Inc. (Piper) Models PA-46-310P and PA-46-350P airplanes. This AD requires calibrating the turbine inlet temperature system to assure the accuracy of the existing turbine inlet temperature indicator and wiring for all of the applicable airplanes, and repairing or replacing any turbine inlet temperature system that fails the calibration test. This AD also requires repetitively replacing the turbine inlet temperature probe on the Model PA-46-350P airplanes, and inserting a copy of this AD into the Pilot's Operating Handbook of certain airplanes. This AD is the result of field reports that indicate service accuracy problems with the existing turbine inlet temperature system. The actions specified by this AD are intended to prevent improper engine operation caused by improperly calibrated turbine inlet temperature indicators or defective turbine inlet temperature probes, which could result in engine damage/failure with consequent loss of control of the airplane.

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

Which aircraft AD 99-15-04 applies to

MakesLewis

ModelsPA-46-310P, PA-46-350P, PA-46

Part-conditional — 471-008, 548-811, 471-009, 481-392.

Applies to Piper PA-46-310P and PA-46-350P airplanes. Prevents improper engine operation caused by improperly calibrated turbine inlet temperature (TIT) indicators or defective TIT probes, which could result in engine damage/failure and consequent loss of control. Requires, within 100 hours TIS, TIT gauge/probe cleaning, inspection, and system calibration per the applicable PA-46-310P/350P Maintenance Manual, Chapter 77-20-00; if calibration/inspection cannot be met, repair or replace with a Lewis Turbine Inlet Temperature Analog Indicator (P/N 471-008), Lewis Turbine Inlet Temperature Digital Indicator (P/N 548-811), or Turbine Inlet Temperature Probe (P/N 471-009 for PA-46-310P, P/N 481-392 for PA-46-350P). PA-46-350P operators with over 150 hours TIS on the installed probe must replace it.

Whether AD 99-15-04 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 99-15-04 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.