The Grand Caravan aircraft was operating a scheduled flight starting from its base at Arusha (ARK). It was to call at Lake Manyara, Klein’s Camp, Grumet and Seronera (SEU) before returning to Arusha via Lake Manyara. The VFR flight to Lake Manyara was uneventful and the aircraft landed at Lake Manyara at 05:55 hours. Five passengers boarded the flight, which departed at 06:15. Shortly after becoming airborne the engine failed. The pilot feathered the propeller and prepared for a forced landing on a road. He then had to make an evasive manoeuvre to avoid a lorry. The airplane lost airspeed, dropped heavily on the left side of the road and collided with heaps of stones before it came to rest some 50 meters beyond the point of initial touch down. Five passengers were seriously injured.