GE Aviation-Safran joint venture CFM International has overcome a delay in deliveries of Leap-1A engines to Airbus's A320neo-family production line, the result of supply-chain bottlenecks relating to forgings and castings – but is still battling a three-week lag in deliveries of the Boeing 737 Max-powering Leap-1B. Speaking at a full-year financial results briefing today, Safran chief executive Philippe Petitcolin said that last year CFM reached a weekly delivery rate of 15-16 Leap-1A engines, in line with Airbus's requirement. The -1A is an option on A320neo-family aircraft. He says Leap-1A deliveries are now on schedule and that production is on a stable "plateau" as Airbus has no plans for any huge rate increase over the coming months. That contrasts with the 737 Max, however. "It is a different story, because Boeing is still in a huge ramp-up and increase of production," says Petitcolin.