Airworthiness Directives; CFM International (CFMI) CFM56-5C Series Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2004-09-09 · Effective 2004-10-14 · 69 FR 54557
Document
Document number
04-20411
Federal Register citation
69 FR 54557
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
CFM International (CFMI) CFM56-5C Series Turbofan
Publication date
2004-09-09
Effective date
2004-10-14
FAA docket
Docket No. 95-ANE-64-AD
Abstract
This amendment revises an existing airworthiness directive (AD) for CFMI CFM56-5C series turbofan engines. That AD currently establishes new life limits for certain high pressure turbine rotor (HPTR) front shafts, HPTR front air seals, and booster spools. This action removes the booster spool, part number (P/N) 337-005-210-0, and the HPTR front shaft, P/Ns 1498M40P03, 1498M40P05, and 1498M40P06, from the parts listed with lowered life limits in the existing AD. This amendment results from a life management review completed by the manufacturer. We are issuing this AD to prevent low-cycle fatigue (LCF) failure of certain HPTR front air seals, which could result in an uncontained engine failure and damage to the airplane.