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Airworthiness Directive

AD 2002-12-09 67 FR 41318 Active

Federal Aviation Administration · 14 CFR part 39

Requires repetitive Spectrometric Oil Analysis Program (SOAP) sampling, SOAP trend assessment, and inspections and replacement of certain gearbox components.

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FR document
02-14855
Amendment
39-12781
Published
2002-06-18
Effective
2002-07-03
Models covered
1

Last live check: 2026-08-19

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AD

2002-12-09

FR doc 02-14855 · 67 FR 41318

AD 2002-12-09Published 2002-06-18Effective 2002-07-03

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires repetitive Spectrometric Oil Analysis Program (SOAP) sampling, SOAP trend assessment, and inspections and replacement of certain gearbox components.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TPE331-11U, -12B, -12JR, - 12UA, -12UAR, and -12UHR series turboprop engines. This action requires repetitive Spectrometric Oil Analysis Program (SOAP) sampling, SOAP trend assessment, and inspections and replacement of certain gearbox components. This amendment is prompted by reports of spur gearshaft (bull gear) rim separations and high-speed pinion (HSP) assembly failures. The actions specified in this AD are intended to prevent bull gear rim separations and HSP assembly failures from abnormal gear wear, which could result in uncontained gearbox fragmentation, in-flight shutdowns, and engine rotor overspeed events.

More directives for Honeywell TPE331

  1. AD 2018-22-01 Airworthiness Directives; Honeywell International Inc. Turboprop Engines Effective 2018-12-10
  2. AD 2018-17-15 Airworthiness Directives; Honeywell International Inc. Turboprop and Tur... Effective 2018-10-22
  3. AD 2018-13-05 Airworthiness Directives; Honeywell International Inc. Turboprop and Tur... Effective 2018-07-26
  4. AD 2018-02-14 Airworthiness Directives; Honeywell International Inc. Turboprop and Tur... Effective 2018-02-28
  5. AD 2016-21-07 Airworthiness Directives; Honeywell International Inc. Turboprop Engines Effective 2016-11-28

All Honeywell TPE331 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index