Boeing was talking about 'a creative financing arrangement' to support Transaero's 748 purchase.
It would be interesting to know what does that mean ?
I am afraid we will never know.
Well, we can try to guess. Transaero is short of cash and probably cannot get a standard credit or a lease. They also have a currency problem with the depreciation of the ruble. However, if you factor in low jetfuel prices, they may still have a chance to fly the aircraft for a profit, provided they don't have to pay excessive financial charges for the purchase.
A Russian government guarantee is in my opinion unlikely to be granted in the present context.
If this is the situation, then Boeing may want to save the deal by funding the purchase or arranging some credit enhancement (= for instance, offering to buy back the aircraft in case of default by Transaero). This means that Boeing would somehow assume most of the risk of Transaero defaulting on its commitments regarding this aircraft.
A more elaborate deal, based an oil barter scheme, and involving several parties, is also possible.