Bangladesh, Sept. 19 -- Boeing is close to finalizing a delayed order for 150 of its 737 MAX jets after Turkish Airlines threatened to walk away from the deal amid a dispute with engine maker CFM over maintenance terms, said media reports, citing sources familiar with the matter.

The order forms part of a broader 225-jet package announced last year following a meeting between Turkish President Tayyip Erdogan and U.S. President Donald Trump. The deal had stalled over the airline's request for an industrial arrangement on engine maintenance but is now back on track, three sources said, adding it could be signed next week.

Airlines have increasingly sought long-term engine maintenance agreements alongside new jet orders, as supply chain sh...