Summary
We are adopting a new airworthiness directive (AD) for all CFM International S.A. (CFM) LEAP-1B21, -1B23, -1B25, -1B27, -1B28, - 1B28B1, -1B28B2, -1B28B2C, -1B28B3, -1B28BBJ1, and -1B28BBJ2 turbofan engines. This AD requires removing certain electronic engine control (EEC) system operation (OPS) and engine health monitoring (EHM) software and installing versions eligible for installation. This AD was prompted by six aborted takeoffs on the similarly designed CFM LEAP-1A model turbofan engine after those 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.
Directive Details
AD Number
FAA-2018-1023
Document Number
2018-26611
Type
Rule
Publication Date
December 11, 2018
Effective Date
December 26, 2018
Affected Manufacturer
CFM International S.A. Turbofan
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2018-1023
Topics
Official Documents
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