Boeing and GE Capital Aviation Services, the commercial aircraft leasing and financing arm of General Electric, Monday announced an order for 40 Next-Generation 737-800s at the Farnborough International Airshow in London.

The order is valued at approximately $3 billion at average list prices.

Through July 13, Boeing has had orders for 138 737s this year.

“We are pleased to announce this Boeing order and the further growth of our fleet,” said Norman C.T. Liu, president and CEO of GECAS, in a company press release. “Over the years, GECAS has successfully leased many 737s to airlines around the world.”

“Today’s announcement with GECAS reaffirms the Boeing Next-Generation 737 as a highly successful asset, both in operation with airlines as well as in the financial community,” said Marlin Dailey, vice president of Sales for Boeing Commercial Airplanes. “GECAS has more than 300 Next-Generation 737s in its fleet with another 105 to be delivered to lessees, including today’s announcement.”

The Next-Generation 737 offers lessors the widest choice of customers to place the airplane and the best residual value retention of any airplane. GECAS’ continuing acquisition of new 737s reflects solid demand for rapid addition of new airplanes by customers throughout the world.