737 Max engine software revised to address icing thrust loss
Boeing 737 Max operators are to be instructed to update engine-control software to address a loss of thrust issue, attributed to icing, on the type’s CFM International Leap-1B powerplants. At least 2 occurrences have been investigated which Leap-1Bs suffered temporary loss of thrust control as a result of icing in engine pressure lines, EASA states. This is despite a previous update to the Leap-1B software which was introduced after a similar problem affected the Leap-1A engine for the Airbus A320neo family. Instances of Leap-1As being unable to accelerate to target thrust during take-off had prompted analysis which determined that water could accumulate and freeze inside the pressure sensor lines or system, possibly resulting in erroneous pressure readings by the full-authority digital engine control. <br/>
https://portal.staralliance.com/cms/news/hot-topics/2020-01-24/general/737-max-engine-software-revised-to-address-icing-thrust-loss
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737 Max engine software revised to address icing thrust loss
Boeing 737 Max operators are to be instructed to update engine-control software to address a loss of thrust issue, attributed to icing, on the type’s CFM International Leap-1B powerplants. At least 2 occurrences have been investigated which Leap-1Bs suffered temporary loss of thrust control as a result of icing in engine pressure lines, EASA states. This is despite a previous update to the Leap-1B software which was introduced after a similar problem affected the Leap-1A engine for the Airbus A320neo family. Instances of Leap-1As being unable to accelerate to target thrust during take-off had prompted analysis which determined that water could accumulate and freeze inside the pressure sensor lines or system, possibly resulting in erroneous pressure readings by the full-authority digital engine control. <br/>
