CFM International is maintaining output of Leap-1B engines for the 737 Max, despite Boeing's decision to trim production of the narrowbody.

Boeing has cut monthly production of the single-aisle from 52 to 42 units as a result of the 737 Max grounding and efforts to return the type to service.

Safran – which jointly owns CFM with GE Aviation – says Leap-1B production is being maintained "at this point", but notes that it might implement "temporary adjustments if necessary".

In February, Safran said CFM had overcome a delivery delay for Leap-1A engines – an option on the Airbus A320neo family – which had developed in 2018 as a result of supply-chain bottlenecks relating to forgings and castings. However, at that point, Leap-1B production was still three weeks behind schedule, it said.

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Leap assembly line at Safran


During the first quarter, CFM's deliveries grew to 577 engines, from 498 during the same period in 2018.

Leap production rose to 424 units – from 186 – while CFM56 deliveries decreased from 312 to 153 as part of a planned ramp-down for the legacy powerplant.

First-quarter revenue for Safran's aerospace propulsion business grew by 19.6% year on year to €2.74 billion ($3.07 billion).

Group chief executive Philippe Petitcolin states: "We stand behind our customers and follow very closely the announcements regarding the 737 Max in order to adapt if necessary."