Airworthiness Directives; CFM International S.A. Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2018-10-10 · Effective 2018-10-25 · 83 FR 50818
Document
Document number
2018-21508
Federal Register citation
83 FR 50818
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
CFM International S.A. Turbofan
Publication date
2018-10-10
Effective date
2018-10-25
FAA docket
Docket No. FAA-2018-0855
Abstract
We are adopting a new airworthiness directive (AD) for all CFM International S.A. (CFM) LEAP-1A23, -1A24, -1A24E1, -1A26, -1A26E1, - 1A26CJ, -1A29, -1A29CJ, -1A30, -1A32, -1A33, -1A33B2, and -1A35A turbofan engines with certain full authority digital engine control (FADEC) and prognostic health monitoring (PHM) software installed. This AD requires removing certain FADEC and PHM software and installing versions eligible for installation. This AD was prompted by aborted takeoffs after engines did not advance to the desired takeoff fan speed due to icing in the pressure sensor line. We are issuing this AD to address the unsafe condition on these products.