Conversation so far:
What date was the near fatal crash Howard Hughes was in?
Hughes was involved in another near-fatal aircraft accident on July 7, 1946, while performing the first flight of the prototype U.S. Army Air Forces reconnaissance aircraft.
Did Howard Hughes sustain any injuries?
Hughes sustained significant injuries in the crash, including a crushed collar bone, multiple cracked ribs, crushed chest with collapsed left lung, and numerous third-degree burns.
Were a crushed collar bone, multiple cracked ribs, crushed chest with collapsed left lung, and numerous third-degree burns Howard Hughes only injuries?
Yes, they were Howard Hughes' only injuries.
When did Howard Hughes get started with his career?

Question: What were the RKO companies?
Self-contained rewrite: What were the RKO companies?