Airworthiness directives › 2018-19-16
AD 2018-19-16 Airworthiness Directives; CFM International S.A. Turbofan Engines
Applicability*9
This AD applies to all CFM LEAP-1A23, -1A24, -1A24E1, -1A26, -1A26E1, -1A26CJ, -1A29, -1A29CJ, -1A30, -1A32, -1A33, -1A33B2, and -1A35A turbofan engines with full authority digital engine control (FADEC) software, part number (P/N) 2590M00P07, version L1A0510, or earlier, installed; and prognostic health monitoring (PHM) software, P/N 2784M64P01, version PL1A0510, or earlier, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 90 days after the effective date of this AD, remove FADEC software, P/N 2590M00P07, version L1A0510, or earlier; and PHM software, P/N 2784M64P01, version PL1A0510, or earlier, from the engine. (2) Before further flight after the removal of the FADEC and PHM software required by paragraph (g)(1), install FADEC and PHM software that is eligible for installation.
Unsafe condition
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 prevent icing in the pressure sensor lines and inaccurate pressure sensor readings. The unsafe condition, if not addressed, could result failure of one or more engines, loss of thrust control, and loss of the airplane.
Affected ADs
None.
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