41 Years ago today: On 23 April 1979 a SAETA Vickers Viscount went missing on a Quito-Cuenca flight; killing all 57 occupants.

Date: Monday 23 April 1979
Time: ca 07:45
Vickers 785D Viscount
Operator: SAETA
Registration: HC-AVP
C/n / msn: 329
First flight: 1957-06-23 (21 years 10 months)
Engines: Rolls-Royce Dart 510
Crew: Fatalities: 5 / Occupants: 5
Passengers: Fatalities: 52 / Occupants: 52
Total: Fatalities: 57 / Occupants: 57
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location: Pastaza Province (   Ecuador)
Crash site elevation: 5500 m (18045 feet) amsl
Phase: En route (ENR)
Nature: Domestic Scheduled Passenger
Departure airport: Quito-Mariscal Sucre Airport (UIO/SEQU), Ecuador
Destination airport: Cuenca Airport (CUE/SECU), Ecuador
Flightnumber: 011

Went missing on a Quito-Cuenca flight and was found 5 years later on high ground, 25nm off track at an elevation of 18000 feet.
The aircraft departed Quito at 07:08 in the morning and was expected to land at Cuenca at 08:00.