 The first production L-049 flew on July 12, 1945 and was delivered to TWA on November 14, 1945.Pan Am received its first L-049 on January 5, 1946.Due to clauses imposed on Lockheed by Howard Hughes, American Airlines and United Airlines went instead to Douglas and ordered the competing DC-6 (AOA, the overseas subsidiary of American Airlines, still purchased the L-049).