Business News Roundup, Sept. 6

Acquisitions

Plane makers

wary of deal

Airplane makers Boeing and Airbus raised concerns Tuesday about the proposed merger of industrial company United Technologies and aerospace parts maker Rockwell Collins, saying that the deal could raise costs or slow the production of planes. Boeing and Airbus both buy equipment from United Tech and Rockwell Collins.

The comments from the two companies came a day after United Tech announced plans to buy Rockwell Collins for about $22.75 billion.