Boeing has swung back to profit column with net earnings of $607m in the second quarter, compared with a $192m loss a year ago, on a rise in defence contract revenues.
Revenues increased 3% from the same period last year to just over $13 billion.
A highlight of the April-June period was Boeing's winning of a $3.9 billion contract to design the US Navy's Multi-mission Maritime Aircraft (MMA).
The Aircraft and Weapon Systems unit showed revenues up 5%, while Boeing's Network Systems delivered a 22% rise in revenues.
But the commercial division struggled, as revenues fell 3% to $5.7 billion even though deliveries increased to 75 planes during the second quarter. The lower results reflect a higher proportion of deliveries of lower-price 737s.