Chicago - On April 11, Boeing announced deliveries across its commercial and defense operations for the first quarter of 2018. Boeing's commercial aircraft deliveries rose about 9 percent and outsold European rival Airbus almost four to one.

As of the end of March 2018, Boeing delivered 184 commercial aircraft, 15 more than the previous year. (132, 737 - 34, 787 - 12, 777 - four 767 - two 747)

American manufacturer recorded 221 net new aircraft orders against 45 of Airbus during the same period.

Boeing benefited from higher demand for its best-selling single-aisle 737 family aircraft, despite recent difficulties in the supply chain of its workhorse.

Last month, Boeing’s largest supplier Spirit AeroSystems Inc. had fallen behind on deliveries of the 737 fuselages.

Spirit and Boeing both expressed confidence that deliveries would get back on track soon. Boeing also said that it had taken required precautions to ensure that the delays wouldn’t affect its own delivery schedules. Spirit AeroSystems produces about 70 percent of every 737 delivered.

Boeing also announced that it made changes in the publishing method for the total number of aircraft already sold and waiting to be built and delivered.

Boeing said it had trimmed 66 aircraft or one percent of the total from the published order backlog, bringing it to 5,835 jets instead of 5,901 under the previous method.