AD 96-12-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | LTP 101-600 | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTP 101-600A | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTP 101-600A-1A | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTP 101-700A-1A | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTS101-600A-2 | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTS101-600A-3 | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTS101-600A-3A | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTS101-650B-1 | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTS101-650B-1A | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
| engine | Honeywell International Inc. | LTS101-650C-2 | Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines |
Unsafe Condition
Workmanship deficiencies on certain power turbine rotors can reduce the published life limit of the disk, leading to power turbine rotor failure which could result in loss of engine power.
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Required Actions
Remove and replace power turbine rotors identified in Textron Lycoming Service Bulletins LT101-72-50-0144 and LT101-72-50-0145, following the specified schedules based on time since new (TSN) and time in service (TIS). LTS101-750B2 models must comply within 100 hours TIS or 800 hours TSN, whichever comes first.
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Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 series turboshaft engines (except LTS101-750B2) and LTP101 series turboprop engines, installed on specified aircraft models. Applies regardless of modifications, alterations, or repairs.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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