Narrative:The crew selected the frequency of the QMS VOR instead of the QIT VOR when trying to carry out the QIT VOR instrument approach procedure. This took the aircraft over the mountainous area 12 miles South of the planned track. The Gulfstream struck the Sincholagua Volcano at FL160.
The flight crew had limited experience on the Gulfstream II. They had completed simulator training in January 1995 and logged 105 flight hours since.
The Junta Investigadora de Accidentes estimates that the accident occurred because the crew selected the wrong frequency, using the Condorcocha VOR instead of the Monjas VOR.
It also considers the lack of familiarity of the crew with instrument procedures of Quito Airport, the limited experience of the two crew members on the Grumman aircraft, neglect of the crew in the final phase of the flight to hold a private conversation, lack of compliance with verification of the frequency selection during descent briefing.
Controlled Flight Into Terrain (CFIT) - Mountain
» ICAO Adrep Summary 4/1995 (#14)
» www.explored.com.ec, 2-6-1995
N404M ended up as N409MA
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not
display the exact flight path.
Distance from La Paz-El Alto Airport to Quito-Mariscal Sucre Airport as the crow flies is 2134 km (1334 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.