Airworthiness Directives; CFM International CFM56 Series Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2002-09-09 · Effective 2002-09-24 · 67 FR 57146
Document
Document number
02-22761
Federal Register citation
67 FR 57146
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
CFM International CFM56 Series Turbofan
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.