On 23 September in New York, with President Erdogan in the room for UN week, Turkish Airlines finalised 100 firm Boeing 737-8s and options on 50 more MAX family jets, with the right to switch some of those frames to the still-uncertified 737-10. It is the carrier’s largest Boeing single-aisle order. Deliveries, the airline told the Istanbul exchange, run from 2033 to 2037. The 787 piece of the 2025 White House package had already closed. The LEAP-1B is the only engine on the MAX. An airframe announcement that takes twelve extra months is no longer an airframe announcement. It is a spare-engine, shop-visit and reliability negotiation that happens to include wings.
Istanbul’s bet is medium-haul density against Gulf hubs and the European majors. A 737-8 is the flexible default. A -10 is more seats on a fat Europe or domestic bank, if Boeing ever certificates it and if Istanbul’s slots and gates can swallow the extra bodies. Optionality is rational when 2033 demand is a guess. It is expensive when pilot training, spare LEAPs and hangar geometry have to be bought for two lengths. The 737-10 substitution is a capacity hedge that only works if the type exists on time. Until then it is a line in a contract.
Airlines now purchase access to shop capacity as much as aluminium. Who holds the spare LEAPs? What is the guaranteed turn time when the next GTF-style shortage hits the other camp and the MAX line feels the pull? Lessors watching Turkish will price residual value on engine hours, not on a ceremony in Manhattan. AJet already flies MAX metal out of Sabiha Gokcen. The parent’s 100-firm order is a 2030s wave. The industrial question is whether CFM’s shops and Türkiye’s MRO plan grow at the same speed as the options.