Airworthiness Directives; General Electric Company Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2012-09-21 · Effective 2012-09-21 · 77 FR 58471
Document
Document number
2012-23443
Federal Register citation
77 FR 58471
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
General Electric Company Turbofan
Publication date
2012-09-21
Effective date
2012-09-21
FAA docket
Docket No. FAA-2012-1017
Abstract
We are adopting a new airworthiness directive (AD) for General Electric Company GEnx-1B54, GEnx-1B58, GEnx-1B64, GEnx-1B67, GEnx-1B70, GEnx-1B54/P1, GEnx-1B58/P1, GEnx-1B64/P1, GEnx-1B67/P1, GEnx-1B70/P1, GEnx-1B70/72/P1, GEnx-1B70/75/P1, GEnx-1B74/75/P1, GEnx-1B75/P1, GEnx- 2B67, and GEnx-2B67B turbofan engines. This AD requires initial and repetitive ultrasonic inspections (UI) of certain part number (P/N) fan mid shafts (FMS) for cracks. This AD was prompted by a report of an FMS failure and a report of a crack found in another FMS. We are issuing this AD to prevent failure of the FMS resulting in one or more engine failure(s) and possible loss of the airplane.