41.   The money-losing commercial aircraft business also showed more signs of health.

42.   The purchase is a major blow for McDonnell Douglas Corp., which for years counted on American Airlines for its struggling commercial aircraft business.

43.   The purchase is a blow for McDonnell Douglas Corp., which has for years counted American Airlines as one of its best customers for its struggling commercial aircraft business.

44.   The purchase will help Condit reach his goal of making Boeing less dependent on the cyclical commercial aircraft business.

45.   The venture would not cover the civil jet aircraft business, in which the two companies are rivals.

46.   Though orders are soaring, profit margins in the commercial aircraft business are very low.

47.   Though its commercial aircraft business is booming now, Boeing has suffered in the past when jet orders dried up.

48.   Toyota, he said, would probably first go into the aircraft engine business, but even that was not definite.

49.   Toyota Motor Corp. is considering entering the aircraft engine business and possibly making small planes as well, Hiroshi Okuda, its president, said Thursday.

50.   Unlike the actual aircraft building business, servicing planes usually provides a steady stream of income.