The first Douglas DC-3 aircraft were ordered by American Airlines (1935) and powered by Wright Cyclone engines. Soon after, United Air Lines ordered the DC-3, but specified Pratt & Whitney Twin Wasp engines. Benny Howard was dispatched to Douglas to oversee the installation of the new engine.
The initial Douglas DC-3 planes were acquired by American Airlines in 1935 and had Wright Cyclone motors. Then, United Air Lines bought the DC-3 but specified Pratt & Whitney Twin Wasp engines. As a result, Benny Howard sent someone from his team to Douglas to oversee the engine swap.