The film was shot on location at Mont Blanc in France. The Malabar Princess disaster actually occurred on 3 November 1950. It was Flight 245, a Lockheed Constellation aircraft of Air India, which had crashed at 4,700 meters above sea level. One of the engines of the wreckage was found on 15 September 1989 on the surface of the Glacier des Bossons, 1,900 m above sea level. A second engine was found on 22 September 2008 at 2,000 m above sea level on the same glacier.