A Conviasa Boeing 737-291 Advanced (registered as YV102T) ferry flight from Maiquetia, Venezuela to Latacunga, Ecuador crashed into Illiniza Volcano.

The aircraft involved was powered by two Pratt & Whitney JT8D-17A engines and was originally delivered on July 6, 1978 to Frontier Airlines.

[1] The accident was investigated by the Dirección General de Aviación Civil (DGAC) of Ecuador.

The findings of the report were as follows (translated from Spanish): "The Accident Investigation Board judges that the probable cause of this accident was non-observance by the flight crew of the technical procedures, configuration, speed and bank angle of the aircraft required to complete the initial turn of Instrument Approach Procedure Number 4 published in the Ecuador Aeronautical Information Publication (AIP) for Latacunga airport, a failure that placed the aircraft outside of the protected area (published pattern), bringing it into high elevation mountainous terrain."

The report also listed the crew's ignorance of the area surrounding the approach path and lack of airline documentation and procedures governing the conduct of flights to non-scheduled and special airports.