Boeing is now building 42 planes a month in its Renton, Wash., factory, up from 31.5 planes a month in 2010.
Last year, the aeronautics giant finished with a record backlog of 5,100 airplanes.
The 737 is Boeing's best-selling jet partly thanks to its fuel efficiency, a big plus for cash-strapped airlines.
Boeing says it aims to deliver 725 airplanes in 2014, up from 715 last year.
Plane demand is up as American and European airlines refresh their fleets, while airlines in Asia and the Middle East are quickly expanding.
Around the world, passenger demand is up — an opportunity for Boeing to sell more planes.
Over the next 20 years, Boeing expects a global demand for more than 35,000 new airplanes.
Over 10,000 employees work at the Renton plant.
LAM – Mozambique Airlines just announced it will purchase three new Next Generation 737s from Boeing, an order valued at $228 million.
Boeing has close to 12,000 commercial jets in service around the world, making up about 75% of the global fleet.
The spars, an internal support structure in the wings, are the first pieces to be constructed in the plane building process.
The 737 has a tail height of 41 feet, 2 inches.
And the plane's wingspan reaches over 117 feet.
Employees developed many of the efficiency-improving strategies for production in-house, according to Beverly Wyse, vice president and general manager, 737 Program, Boeing Commercial Airplanes.
Boeing hopes to make the building process even faster, aiming for 47 planes per month by 2017.
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