Boeing Co. says unidentified customers have ordered 50 more of its 737s.
Just last week Boeing said unidentified customers had ordered 30 of the planes, which it makes more of than any other. On Thursday it added the orders for 50 more. Boeing has already said it will raise production rates to 38 per month by mid-2013.
Airlines and leasing companies have ordered 432 of the planes so far this year. That's out of a total of 472 orders for all commercial planes. The 737 has a list price between $51 million and $87 million, although discounts are common.
Different versions of the 737 can carry from 110 to more than 200 passengers, usually on domestic flights. It competes with the Airbus A320 built in Europe.