| Date: | Thursday 29 December 1977 |
| Time: | |
| Type: | Vickers 764D Viscount |
| Owner/operator: | SAN Ecuador - Servicios Aéreos Nacionales |
| Registration: | HC-BEM |
| MSN: | 183 |
| Year of manufacture: | 1956 |
| Fatalities: | Fatalities: 24 / Occupants: 24 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed, written off |
| Category: | Accident |
| Location: | near Cuenca -
Ecuador
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Guayaquil-Simon Bolivar Airport (GYE/SEGU) |
| Cuenca Airport (CUE/SECU) |

| Date/time | Contributor | Updates |
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