DC-6 was operating on a cargo flight to Kelly AFB. The crew decided to divert to civilian international airport at San Antonio and commenced the approach. The airplane descended 1100 feet below the glide slope, flew through trees and collided with a cliff. Probable cause: "Undetermined". See also List of defunct airlines of the United States References External links Airliners.net photos Fleet and code data In Memoriam Defunct airlines of the United States Airlines established in 1948 Airlines disestablished in 1976 American companies established in 1948 1976 mergers and acquisitions 1948 establishments in California 1976 disestablishments in California Airlines based in California