Production. Airplane manufacture, general. Finished plane parts from the drop hammer department of North American Aviation, Incorporated at Inglewood, California, are placed on trucks and delivered to the sheet metal and sub-assembly department. This plant produces the battle-tested B-25 ("Billy Mitchell") bomber, used in General Doolittle's raid on Tokyo, and the P-51 ("Mustang") fighter plane, which was first brought into prominence by the British raid on Dieppe