CFM International is using the grounding of the Boeing 737 MAX to catch up with deliveries of the aircraft’s Leap-1B engine and develop long-term fixes to address early in-service issues.
Previously, fuel nozzles have had to be removed from the engine for cleaning. In the meantime, an improved fuel nozzle design is under development to avoid the issue altogether. The radial drive shaft is part of the accessory drive train (ADT) that was developed for the Leap by Safran Transmission Systems. The long-term solution will be released soon, says CFM executive vice president Sébastien Imbourg. The improvement work comes as CFM enters the final phases of transitioning production wholly to the Leap. “The plan right now says we are not changing our delivery output”, says CFM president Gaël Méheust. CFM is managing the excess engine numbers by delivering more spares, Imbourg says.
Collected and summarized from the source below by Minh Pham https://aviationweek.com/paris-airshow-2019/cfm-uses-max-downtime-leap-improvements