Flying Tiger Line Flight 739 (FT739/FTL739) was a Lockheed L-1049 Super Constellation propliner that disappeared on March 16, 1962, over the western Pacific Ocean.

The aircraft, which had been chartered by the United States Army, was transporting ninety-six military passengers from Travis Air Force Base in California to Tan Son Nhut International Airport in Saigon, South Vietnam.

A civilian tanker observed what appeared to be an in-flight explosion believed to be the missing Super Constellation, though no trace of wreckage or debris was ever recovered.

[5] The flight crew consisted of eleven civilians based out of California, including seven men,[2] under the command of Captain Gregory P.

The flight arrived at Guam at 11:14 GMT, on March 15, after being delayed for minor maintenance on engines numbers 1 and 3 at Honolulu, and later at Wake Island.

[6] Eighty minutes after departure, at 14:22 GMT, the captain radioed a routine message and gave his position as being 280 nautical miles (520 km; 320 mi) west of Guam at coordinates (13°40′N 140°0′E / 13.667°N 140.000°E / 13.667; 140.000).

U.S. Secretary of the Army Elvis Stahr told newspapers that "we have not given up hope that it will be found and that those aboard are safe," and that a "maximum effort" was being made.

[4] After four days of searching, Major General Theodore R. Milton of the 13th Air Force told newspapers that although the chance of finding survivors was doubtful, every effort would be made "as long as there is any hope at all.

Both Flight 739 and the other aircraft, an L-1049 Super Constellation, departed from Travis Air Force Base at around 09:45 PST on Wednesday, March 14, 1962, and both encountered difficulties several hours later.

[4][9] Flying Tiger Lines released a statement outlining some possible reasons for the two occurrences, including sabotage of either or both aircraft or kidnapping of Flight 739 and its passengers.

[4][9] A Liberian tanker, the SS T L Linzen, reported seeing a bright light in the sky near the aircraft's expected position about ninety minutes after the last radio contact.

"[7] Officials with the Flying Tiger Line said that their earlier theories of sabotage would be bolstered were the investigation to reveal that an explosion had occurred.