It said second-quarter sales were expected to total about $225 million, up 33 percent.
Second-quarter sales were up 19.3 percent from last year, to $1.65 billion.
The unit provided 48 percent of the company's second-quarter sales.
But Boeing said second-quarter sales were expected to be higher.
Its second-quarter sales were down 6.7 percent, to $273.6 million, despite increased revenue in the manufacturing business.
Second-quarter sales had risen 2.2 percent compared to the second quarter a year earlier.
Last week, the company said it expected second-quarter sales to grow 1.1 percent in its retail stores.
Electronic Arts reported second-quarter sales of $675 million, down from $716 million in the period a year earlier.
Alcoa, for example, said late Monday that its second-quarter sales grew 62 percent.
Second-quarter sales rose 7.9 percent, to $1.09 billion, from $1.01 billion a year earlier.