On 11 April 1967, a DC-4 was flying a domestic flight from Algiers to Tamanrasset with several intermediate stops when on approach, it descended too low and struck a mountain.
7T-VAU was a Douglas DC-4 that first flew in 1943. It was powered by 4 piston engines.[1]
On the night approach to Tamanrasset the plane descended too low and struck a mountainside, 300 meters below the summit. The impact forces and the ensuing fire killed 35 of the 39 people on board and severely injured the 4 survivors.[1][2]