Aeropesca Colombia Flight 221 Aeropesca Colombia Flight 221 Aeropesca Colombia Flight 221 was an internal scheduled passenger flight from Florencia Airport to Neiva Airport in Colombia. On 26 August 1981 it was being operated by a Vickers Viscount turboprop airliner registered in Colombia as "HK-1320" when it collided with Mount Santa Elana, an Andean mountain peak, destroying the aircraft and killing all 50 on board. The investigation by the Colombian authorities concluded the probable cause was "continuing VFR in meteorological conditions below the minimum laid down in the Manual of Colombian air routes". The aircraft was a four-engined Vickers Viscount 745D turboprop airliner registered
Vickers Valiant military aircraft. It was followed by the Vanguard, a passenger turboprop designed in 1959, and the Vickers VC10, a jet passenger aircraft in 1962, also used as a military transport and tanker by the RAF. The Valiant was a conservative design of the era, having a shoulder-mounted wing and four Rolls-Royce Avon RA.3 turbojet engines, each providing up to of thrust, installed in pairs in fireproof bays in each wing root. The design of the Valiant gave an overall impression of a plain and clean aircraft with simple aerodynamics. George Edwards described the Valiant appropriately and simply as an "unfunny"