On 29 July 1972, Avianca Flight 630, operating a scheduled domestic passenger flight within Colombia, flying from La Vanguardia Airport to Los Colonizadores Airport, with stopovers at Paz de Ariporo Airport and Santiago Pérez Quiroz Airport, collided with another Avianca flight, operating as Flight 626, also operating a scheduled domestic passenger flight within Colombia from La Vanguardia Airport to Las Gaviotas Airport, with stopovers in 3 different cities. The resulting mid-air collision killed all 21 occupants on board Flight 630 and all 17 occupants on board Flight 626, resulting in 38 total fatalities.
The aircraft operating Flight 630 was a 29 year old Douglas DC-3A, built in 1943 and registered as HK-107, with the manufacturing number being 11723. It was equipped with two Pratt & Whitney R-1830 Twin Wasp engines.
On board flight 630 were 3 crew members, consisting of Captain Alvaro Gómez, First Officer Carlos López, and Flight Engineer Gustavo Amortequl.
The aircraft operating as Flight 626 was also a 29 year old Douglas DC-3A built in 1943, with the registration HK-1341 and manufacturing number 11716. It was also equipped with two Pratt & Whitney R-1830 Twin Wasp engines.
There were also three crew members on board Flight 626, consisting of Captain Enrique Medina, First Officer Julio Barona, and Flight Engineer Martin Correal.
No flight attendants were on board either aircraft.
Flight 630 took off from La Vanguardia Airport at 06:20 local time and began heading towards its first stopover, Paz de Ariporo Airport. Flight 626 took off two minutes after Flight 630, at 06:22 local time. The exact sequence is not known, but both aircraft were supposed to have a separation of about two minutes. However, despite the separation, they collided at 06:53 local time, killing a total of 38 people on both planes.
Shortly after the mid-air collision, an investigation by Colombia's Civil Aeronautics Administration was launched. The investigation lasted an unknown amount of time, but ultimately a cause was not determined with a contributing factor being that both aircraft weren't equipped with a CVR or a FDR.