Engines
CFM Modifications Ease Leap Engine Maintenance Burden
FAA certification for reverse bleed cooling system now close
CFM Leap engine
CFM is introducing modifications to improve the reliability of its Leap family of narrowbody airliner engines. © CFM International

CFM International says it is achieving breakthroughs in ongoing efforts to reduce the maintenance burden for airliners powered by its Leap engines. On Monday, the manufacturer reported that it is increasing the availability of a reverse bleed system that is already on almost half of the Leap-1A turbofans.

The new system prevents carbon build-up on the fuel nozzles by circulating cooling air through the engine core after shutdown. CFM is awaiting imminent engine-level FAA certification of the technology for the Leap-1B model.

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