AD 93-13-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | LTP 101-600 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTP 101-600A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTP 101-600A-1A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTP 101-700A-1A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-600A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-600A-1 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-600A-2 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-600A-3 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-600B | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-600B-3 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650A-1 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650A-2 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650B-1 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650B-1A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650C | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650C-2 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650C-3 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-650C-3A | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-750A-1 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-750A-3 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-750B-1 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-750B-2 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-750C-1 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
| engine | Honeywell International Inc. | LTS101-850B-2 | TEXTRON LYCOMING Model LTS 101 and LTP 101 Series Engines |
Unsafe Condition
The unsafe condition could occur if the engine's crankshaft gear train assembly fails due to gear tooth fracture or bearing failure, which could result in loss of engine power and subsequent forced landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the crankshaft gear train assembly for gear tooth fractures or bearing damage, and replace the assembly if any damage is found. Revise the maintenance instructions to include inspection requirements for the crankshaft gear train assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Textron Lycoming LTS101 and LTP101 series engines installed on certain models of aircraft, as specified in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Gas Generator Turbine Rotor Disk
Applicability Source Text
Show captured applicability text from the source AD
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Document Text
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Skip to main content (Press Enter). United States Department of Transportation About DOTOur ActivitiesAreas of Focus FAA Dynamic Regulatory System A Comprehensive Knowledge Center of Regulatory and Guidance Material from the Office of Aviation Safety and other Services and Offices Welcome, Guest Sign In Search What's New DRS Feedback Help & Training Home Browse Expand AllCollapse All Airworthiness Directives (ADs) Regulations Regulation Related Documents and Reports Civil Aeronautics Manuals Advisory Circulars Order 8900.1, Flight Standards Information Management System Other Orders, Notices, Handbooks, Bulletins and Manuals Technical Standard Orders (TSO), Consensus Standards Policy Statements, Memos and Deviations Safety Assurance System (SAS) Design and Production Approvals Aircraft Safety Alerts Aircraft Evaluation Division (AED) Guidance Documents including MMELs Office of the Chief Counsel (AGC) Commercial Space (AST) Air Traffic Organization (ATO) Flight Standards (FS) Administrative Information Aviation Safety Draft Documents Open for Comments Advisory and Rulemaking Committees Other Documents DRS consolidates information provided by various Services and Offices and does not own any of the content within the system. For technical questions or comments about any document in DRS or to request reconsideration, modification, or rescission of guidance documents, please contact the Office of Primary Responsibility (OPR) using the feedback feature while viewing the document. For comments that FAA is not following the requirements of OMB's Good Guidance Bulletin or is improperly treating a guidance document as a binding requirement please contact AGC-200 using the feedback feature while viewing the document. Basic Search of Current Documents Basic Search Tips Enter one or more words separated by spaces. Put a word or phrase inside double quotes to search for an exact match. SearchReset Advanced Search Limit results to All U.S. Department of Transportation Federal Aviation Administration 800 Independence Avenue, SW Washington, DC 20591 (866) TELL-FAA | (866) 835-5322 Privacy Policy Accessibility
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
2011-08-06
final ruleAirworthiness Directives; Honeywell International Inc. LTS101 Series Turboshaft Engines and LTP101 Series Turboprop Engines
Unsafe Condition: reports of fatigue cracks in the airfoil of the power turbine blade
2009-24-12
final ruleAirworthiness Directives; Honeywell International Inc. LTS101 Series Turboshaft and LTP101 Series Turboprop Engines
Unsafe Condition: Rupture of the gas generator turbine disc, which could result in uncontained engine failure and damage to the aircraft.
2002-03-09 R1
final ruleAirworthiness 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.
2001-25-04
final ruleAirworthiness Directives; Honeywell International Inc. Models LTS101-600A-2 and LTS101-600A-3 Turboshaft Engines; and LTP101-600A-1A and LTP101-700A-1A Turboprop Engines
Unsafe Condition: Corrosion damage to beryllium-copper bellows in fuel controls can lead to uncommanded power loss due to reduced fuel flow to minimum flow.