WASHINGTON, Dec 7 (Reuters) – Boeing has signaled to suppliers that plans to ramp up production of its bestselling 737 narrowbody jetliner will move about two months more slowly than originally anticipated, according to two people with knowledge of the matter.

The U.S. planemaker now expects it will produce 42 of its 737s per month starting in February 2024, according to a new master schedule that Boeing briefed to its suppliers over the past week, the sources said.

Analysts had already suspected Boeing would alter its on-paper schedule, which targeted the end of 2023 to reach 42 jets produced per month, after a supplier error slowed ramp-up plans this autumn.

The new schedule pushes subsequent rate increases as well, shifting Boeing’s plan for 47.2 jets a month from June to August 2024, while its target to increase 737 production to 52.5 jets a month was moved from December 2024 to February 2025.

Boeing now expects to hit its pre-pandemic goal of 57.7 aircraft per month in October 2025, a delay of three months from the original July 2025.

Boeing shares were down 1.3% on Thursday in midday trade following the Reuters’ publication of the new schedule.

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