It was meant to be the last, routine leg of a long day. On the evening of 18 May 2011, a Saab 340 lifted off from Neuquen carrying 22 people toward Comodoro Rivadavia, the final stop on a domestic hop that had already crossed half of Argentina without trouble. Aboard were ordinary travelers heading home, among them an infant. The flight would last only minutes. Somewhere over the dark Patagonian steppe, in a winter sky thick with ice, the aircraft came down between the villages of Los Menucos and Prahuaniyeu, and no one survived. It remains the deadliest accident in the Saab 340's history.
Flight 5428 had begun far to the north, at Rosario, and had threaded its way south through Cordoba, Mendoza, and Neuquen, three stops handled without incident. At Neuquen, the twin-turboprop took off at 20:05 for the run to Comodoro Rivadavia, where nearly everyone aboard was bound for home. These were not adventurers in a dangerous place but commuters on a scheduled airline, trusting the same short flight thousands take across Patagonia every week. That ordinariness is part of what makes the night so hard to absorb. The danger that found them was invisible, gathering quietly in the cold air ahead as the aircraft climbed away from the lights of the city.
At around 20:29, climbing toward its assigned altitude of 19,000 feet, the Saab ran into icing conditions and leveled off at 17,800 feet. For about nine minutes it held there as ice built on the airframe. When the crew began descending toward 14,000 feet in search of warmer air, conditions only worsened over the next seven minutes. Ice changes the very shape of a wing, robbing it of lift in ways that can outpace the systems meant to shed it. Control was lost soon after, and the aircraft came down in a remote stretch of Rio Negro province, far from any town, on ground so empty that reaching the site was its own ordeal.
Argentina's civil aviation accident board, the JIAAC, examined the wreckage and the recorders and published its final report in March 2015, confirming an earlier preliminary finding. The aircraft itself was sound; investigators found no technical defect. The icing, they concluded, had simply been severe enough to overwhelm the Saab's de-icing systems. But the report did not stop there. It also found that the crew's handling of engine power and airspeed had been inadequate. The engines were never set to full power, and the airspeed was allowed to bleed away until the wing could no longer fly and the aircraft stalled. The verdict was a sobering combination: a brutal environment, and decisions in the cockpit that left too little margin to escape it.
The crash site lies in some of the loneliest country in Argentina, a high cold steppe where the wind rarely rests and the nearest settlements are small. For the families of the 22, the distance only deepened the grief; recovering their loved ones from such a place took time and effort under harsh conditions. Accidents like this one do leave something behind beyond sorrow. The careful work of investigators, and the lessons drawn from severe icing and the management of a struggling aircraft, feed back into the training and procedures meant to protect the next flight. It is a small consolation against a great loss, but it is the one aviation knows how to offer: that those who did not arrive should make the journey safer for everyone who flies after them.
The accident site lies near 41.10 S, 67.94 W, on the open steppe of Rio Negro Province between the villages of Los Menucos and Prahuaniyeu, deep in the Patagonian Desert. There is no monument or structure marking the spot; the terrain is flat, arid scrubland with sparse roads, and the area is notable chiefly for its remoteness and the strong winter winds that contributed to the tragedy. The departure airport was Neuquen / Presidente Peron International (ICAO SAZN), about 250 km to the west-northwest and the nearest major field; the intended destination was Comodoro Rivadavia / General Enrique Mosconi International (ICAO SAVC) on the Atlantic coast to the southeast. Winter brings icing aloft and severe turbulence; recommended viewing altitude 9,000 to 12,000 ft over empty high desert, with caution that the very conditions visible here can be hazardous to aircraft.