Accident description
Last updated: 23 July 2014
Status:Final
Date:Sunday 8 December 1957
Time:16:45
Type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas DC-4
Operator:Aerolineas Argentinas
Registration: LV-AHZ
C/n / msn: 27227
First flight: 1944
Engines: 4 Pratt & Whitney R-2000-13
Crew:Fatalities: 6 / Occupants: 6
Passengers:Fatalities: 55 / Occupants: 55
Total:Fatalities: 61 / Occupants: 61
Airplane damage: Damaged beyond repair
Location:25 km (15.6 mls) SE of Bolivar, BA (   Argentina) show on map
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Buenos Aires/Ezeiza-Ministro Pistarini Airport, BA (EZE/SAEZ), Argentina
Destination airport:San Carlos de Bariloche International Airport, RN (BRC/SAZS), Argentina
Flightnumber: 670
Narrative:
The Aerolineas Argentinas DC-4 took off from Buenos Aires-Ezeiza at 15:54 for a flight to San Carlos de Bariloche. The crew were cleared for an IFR flight outside airways with a minimum altitude of 1200m to Neuquen and 2400m from Neuquen to San Carlos de Bariloche. It was established that the aircraft flew at 100-150m for a distance of 35-40 km, deviating 21km from its intended route. It is assumed that the pilot tried to fly below an intense upper front. The DC-4 flew into the front at its most active part, climbed sharply. At about 2500m the aircraft lost control and dove to the ground. It struck the ground at a 35deg descent angle, 25deg left bank and with a speed of over 400km/h.

PROBABLE CAUSE: "The aircraft disintegrated in flight due to breakage of parts of the left wing followed by the falling off of the tail section when the equipment was subjected to stresses above those envisaged by the manufacturer. This was brought about as a direct result of the pilot's decision to attempt to cross a cold surface front under turbulent conditions of extreme severity.
Contributing causes were: 1) The pilot's recklessness in descending on a track well below the minimum safety flight altitude established for this type of operation.; 2) The absence in the flight plan of a forecast showing the intensity of the meteorological phenomena encountered; 3) Inadequate operational dispatch of the aircraft."

Classification:
Wing failure
Loss of control

Sources:
» ICAO Accident Digest No.9, Circular 56-AN/51 (245-252)
» Informe Final de Accidente de Aviación N° 918 / Junta de Investigación de Accidentes de Aviación (JIAAC)


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Map
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 Buenos Aires/Ezeiza-Ministro Pistarini Airport, BA to San Carlos de Bariloche International Airport, RN as the crow flies is 1305 km (816 miles).

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Douglas DC-4

  • 193rd loss
  • 1242+ built
  • 3rd worst accident (at the time)
  • 8th worst accident (currently)
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 Argentina
  • worst accident (at the time)
  • 3rd worst accident (currently)
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