Airworthiness Directives; CFM International (CFMI) CFM56-2, -2B, -3, -5B, -5C and -7B Series Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2001-06-01 · Effective 2001-06-11 · 66 FR 29689
Document
Document number
01-13720
Federal Register citation
66 FR 29689
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2001-06-01
Effective date
2001-06-11
FAA docket
Docket No. 2001-NE-18-AD
Abstract
This amendment adopts a new airworthiness directive (AD) that is applicable to CFMI CFM56-2, -2B, -3, -5B, -5C and -7B series turbofan engines. This action requires limiting engines with certain No. 4 bearings to one on each airplane, replacement of certain No. 4 bearings, and increased frequency of inspections for magnetic particles until the suspect bearing is replaced. This action is prompted by reports of two bearing failures in the fleet since December 2000. The actions specified in this AD are intended to prevent bearing failures, which could cause an engine failure.