The flight crew’s continuation of an unstable dark night visual approach and the captain’s instruction to use air brakes during the approach contrary to airplane operating limitations, which resulted in a descent below the glide path, and a collision with terrain. Contributing to the accident was the captain’s poor crew resource management and failure to take over pilot flying responsibilities after the first officer repeatedly demonstrated deficiencies in flying the airplane, and the operator’s lack of safety management system and flight data monitoring program to proactively identify procedural non-compliance and unstable approaches.