It can mean any number of things depending on the contract. An order could be everything from a a vague deceleration of interest, to an obligation to buy the pl

It can mean any number of things depending on the contract. An order could be everything from a a vague deceleration of interest, to an obligation to buy the plane at a set price given that it meets some criteria. The article doesn't say which it is, or if it's anything in-between.