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Airworthiness Directives; Honeywell International, Inc. (Type Certificate Previously Held by AlliedSignal, Inc. and Textron Lycoming) Turboshaft Engines

Unsafe Condition: tachometer drive spur gear failure, resulting in potential engine overspeed, loss of power turbine speed (N2) instrument panel indication, and hard landings.

Why matched: Airworthiness Directives; Honeywell International, Inc. (Type Certificate Previously Held by AlliedSignal, Inc. and Textron Lycoming) Turboshaft Engines

Airworthiness Directives; Honeywell International Inc. (Type Certificate Previously Held by AlliedSignal Inc., Garrett Turbine Engine Company) Turbofan Engines

Unsafe Condition: Certain interstage turbine transition (ITT) ducts failing to meet containment capability requirements.

Why matched: Airworthiness Directives; Honeywell International Inc. (Type Certificate Previously Held by AlliedSignal Inc., Garrett Turbine Engine Company) Turbofan Engines

Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal, Inc., Formerly Textron Lycoming, Formerly Avco Lycoming) T5309, T5311, T5313B, T5317A, T5317A-1, and T5317B Series, and T53-L-9, T53-L-11, T53-L-13B, T53-L-13BA, T53-L-13B S/SA, T53-L-13B S/SB, T53-L-13B/D, and T53-L-703 Series Turboshaft Engines

Unsafe Condition: Failure of certain compressor, gas producer, and power turbine rotating components, which could result in failure of the engine and possible damage to the helicopter.

Why matched: Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal, Inc., Formerly Textron Lycoming, Formerly Avco Lycoming) T5309, T5311, T5313B, T5317A, T5317A-1, and T5317B Series, and T53-L-9, T53-L-11, T53-L-13B, T53-L-13BA, T53-L-13B S/SA, T53-L-13B S/SB, T53-L-13B/D, and T53-L-703 Series Turboshaft Engines

Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal, Inc., Formerly Textron Lycoming, Formerly Avco Lycoming) T5309, T5311, T5313B, T5317A, T5317A-1, and T5317B Series, and T53-L-9, T53-L-11, T53-L-13B, T53-L-13BA, T53-L-13B S/SA, T53-L-13B S/SB, T53-L- 13B/D, and T53-L-703 Series Turboshaft Engines

Unsafe Condition: Failure of certain compressor, gas producer, and power turbine rotating components due to lower calculated service life limits than previously published.

Why matched: Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal, Inc., Formerly Textron Lycoming, Formerly Avco Lycoming) T5309, T5311, T5313B, T5317A, T5317A-1, and T5317B Series, and T53-L-9, T53-L-11, T53-L-13B, T53-L-13BA, T53-L-13B S/SA, T53-L-13B S/SB, T53-L- 13B/D, and T53-L-703 Series Turboshaft Engines

Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -3 Series Turbofan Engines

Unsafe Condition: could result in an uncontained engine failure and damage to the airplane.

Why matched: Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc. and Garrett Turbine Engine Co.) TFE731-2 and -3 Series Turbofan Engines

Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc., Garrett Turbine Engine Company, and AiResearch Manufacturing Company of Arizona) TPE331-10 and -11 Series Turboprop Engines

Unsafe Condition: The FAA is adopting a new airworthiness directive (AD) for Honeywell International Inc. (formerly AlliedSignal Inc., Garrett Turbine Engine Company, and AiResearch Manufacturing Company of Arizona)...

Why matched: Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc., Garrett Turbine Engine Company, and AiResearch Manufacturing Company of Arizona) TPE331-10 and -11 Series Turboprop Engines

Airworthiness Directives; Honeywell International, Inc., (Formerly AlliedSignal, Inc. and Textron Lycoming) LF507 and ALF502R Series Turbofan Engines

Unsafe Condition: Separation of the combustor dome baffle from the combustion chamber liner assembly, leading to engine combustion chamber liner assembly burn through.

Why matched: Airworthiness Directives; Honeywell International, Inc., (Formerly AlliedSignal, Inc. and Textron Lycoming) LF507 and ALF502R Series Turbofan Engines

Airworthiness Directives; Honeywell International, Inc., (formerly AlliedSignal, Inc. and Textron Lycoming) T5313B, T5317 Series, and T53 Series Turboshaft Engines

Unsafe Condition: Centrifugal compressor impellers may have been inadvertently misidentified, potentially leading to operation beyond their design service life, which could result in premature failure, uncontained e...

Why matched: Airworthiness Directives; Honeywell International, Inc., (formerly AlliedSignal, Inc. and Textron Lycoming) T5313B, T5317 Series, and T53 Series Turboshaft Engines

Airworthiness Directives; Honeywell International, Inc. (formerly AlliedSignal Inc., and Textron Lycoming) ALF502 and LF507 Series Turbofan Engines

Unsafe Condition: Continuous analysis of field-returned hardware indicates smaller service life margins than originally expected, which could lead to GPT component failure and an uncontained engine failure.

Why matched: Airworthiness Directives; Honeywell International, Inc. (formerly AlliedSignal Inc., and Textron Lycoming) ALF502 and LF507 Series Turbofan Engines

Airworthiness Directives; Honeywell International, Inc., (Formerly AlliedSignal, Inc., Textron Lycoming, Avco Lycoming, and Lycoming) Former Military T53 Series Turboshaft Engines

Unsafe Condition: Low-cycle fatigue failure of the centrifugal compressor impeller, resulting in an uncontained engine failure.

Why matched: Airworthiness Directives; Honeywell International, Inc., (Formerly AlliedSignal, Inc., Textron Lycoming, Avco Lycoming, and Lycoming) Former Military T53 Series Turboshaft Engines

Airworthiness Directives; Honeywell International Inc. (formerly AlliedSignal Inc. and Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines

Unsafe Condition: Impeller failure from cracks in the impeller back face area, which could result in an uncontained engine failure.

Why matched: Airworthiness Directives; Honeywell International Inc. (formerly AlliedSignal Inc. and Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines

Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc. and Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines

Unsafe Condition: A machining discrepancy during manufacture of certain impellers may result in cracks in the impeller back face area, potentially leading to impeller failure and an uncontained engine failure.

Why matched: Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc. and Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines

Airworthiness Directives; Honeywell International Inc. (formerly AlliedSignal Inc. and Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines

Unsafe Condition: Impeller failure from cracks in the impeller back face area, which could result in an uncontained engine failure.

Why matched: Airworthiness Directives; Honeywell International Inc. (formerly AlliedSignal Inc. and Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines

Airworthiness Directives; Honeywell International, Inc., (Formerly AlliedSignal, Inc., and Textron Lycoming) T5311A, T5311B, T5313B, T5317A, T5317B, T53-L-11, T53-L-11A, T53-L-11B, T53-L-11C, T53-L-11D, T53-L-11A S/SA, T53-L-13B, T53-L-13B S/SA, T53-L-13B S/SB, and T53-L-703 Turboshaft Engines

Unsafe Condition: Tachometer drive spur gear failure, potentially leading to engine overspeed, loss of power turbine speed (N2) instrument panel indication, and hard landings.

Why matched: Airworthiness Directives; Honeywell International, Inc., (Formerly AlliedSignal, Inc., and Textron Lycoming) T5311A, T5311B, T5313B, T5317A, T5317B, T53-L-11, T53-L-11A, T53-L-11B, T53-L-11C, T53-L-11D, T53-L-11A S/SA, T53-L-13B, T53-L-13B S/SA, T53-L-13B S/SB, and T53-L-703 Turboshaft Engines

Airworthiness Directives; Honeywell International (formerly AlliedSignal Inc.) 36-300(A), 36-280(B), and 36-280(D) Series Auxiliary Power Units

Unsafe Condition: Reports of load compressor impeller failures have been received, which could lead to an uncontained APU failure and damage to the airplane.

Airworthiness Directives; AlliedSignal Inc. ALF502 and LF507 Series Turbofan Engines

Unsafe Condition: This amendment supersedes two existing airworthiness directives (AD's), applicable to AlliedSignal Inc. ALF502 and LF507 series turbofan engines, that require rework or replacement of No. 4 and 5 b...

Why matched: Airworthiness Directives; AlliedSignal Inc. ALF502 and LF507 Series Turbofan Engines