# Airworthiness Directives; AlliedSignal, Inc. (formerly Textron Lycoming) Models LTS101-650B1, -750B1, -650C, and -750C Turboshaft Engines
> **Rule** · Final rule. · Published 1996-02-22 · Effective 1996-04-22 · 61 FR 6766
## Document
- **Document number:** 96-2589
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 61 FR 6766
- **Publication date:** 1996-02-22
- **Effective date:** 1996-04-22
- **FAA docket:** Docket No. 95-ANE-08
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to AlliedSignal, Inc. (formerly Textron Lycoming) Models LTS101-650B1, -750B1, -650C, and -750C turboshaft engines, that requires installation of an improved power turbine (PT) rotor and electronic PT rotor overspeed controller as a terminating action to the currently required inspections of AD 88-14-01. This amendment is prompted by reports of additional bearing failures since publication of AD 88-14-01, including one additional uncontained PT disk failure. The actions specified by this AD are intended to prevent PT overspeed and uncontained engine failure.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1996/02/22/96-2589/airworthiness-directives-alliedsignal-inc-formerly-textron-lycoming-models-lts101-650b1--750b1--650c)
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