Airworthiness Directives; CFM International S.A. Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2018-10-01 · Effective 2018-10-16 · 83 FR 49272
Document
Document number
2018-21245
Federal Register citation
83 FR 49272
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
CFM International S.A. Turbofan
Publication date
2018-10-01
Effective date
2018-10-16
FAA docket
Docket No. FAA-2018-0785
Abstract
The FAA is superseding Airworthiness Directive (AD) 2018-10-11 for all CFM International S.A. (CFM) Model CFM56-7B engines. AD 2018- 10-11 required initial and repetitive inspections of certain fan blades and, if they fail the inspection, their replacement with parts eligible for installation. This superseding AD requires the same initial and repetitive inspections but revises the compliance time for the repetitive inspections. This AD was prompted by further analysis by the manufacturer that indicated a need to reduce the repetitive fan blade inspection interval based on ongoing root cause investigation of an April 2018 engine failure. The agency is issuing this AD to address the unsafe condition on these products.