By Jon Hemmerdinger2021-04-14T15:15:00+01:00 Boeing’s total aircraft orders tumbled by roughly 800 jets in the last 12 months, bringing an abrupt end to the company’s remarkable sales successes in the preceding decade. The backlog losses reflect a pile of cancellations offset by far fewer orders, at a time when the pandemic sunk new-jet demand and Boeing worked to overcome the 737 Max’s travails. At the end of March, Boeing’s number of total orders stood at about 17,000 aircraft, including jets already delivered and 4,054 aircraft in its backlog. That is down from the 17,835 total orders, including 5,049 in the backlog, that Boeing held at the end of March 2020, company data shows.