# Airworthiness Directives; CFM International CFM56 Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2002-09-09 · Effective 2002-09-24 · 67 FR 57146
## Document
- **Document number:** 02-22761
- **Category:** airworthiness
- **Manufacturer:** CFM International CFM56 Series Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 67 FR 57146
- **Publication date:** 2002-09-09
- **Effective date:** 2002-09-24
- **FAA docket:** Docket No. 95-ANE-64-AD
## Abstract

This amendment revises an existing airworthiness directive (AD) that is applicable to CFM International (CFMI) CFM56-5C series turbofan engines. This action establishes new life limits for certain low pressure turbine rotor (LPTR) stage 3 disks and all high pressure turbine rotor (HPTR) disks listed in the existing AD. This amendment is prompted by the results of an extensive life management program performed by the manufacturer. The actions specified in this AD are intended to prevent low-cycle-fatigue (LCF) failure of certain HPTR front shafts, HPTR front air seals, HPTR disks, booster spools, and LPTR stage 3 disks, which could result in an uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/09/09/02-22761/airworthiness-directives-cfm-international-cfm56-series-turbofan-engines)
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