The airplane operated on an international charter flight from Belgrade, Yugoslavia, to Brussels, Belgium. It took off at 00:55 GMT. After a normal flight the aircraft started the approach at 03:04 GMT. Radio contact was normal, no difficulty was reported by crew, and the normal before landing check list had been completed. At an altitude of about 1 meter, power was reduced and at that moment the landing gear warning horn was heard. Power was increased by the co-pilot, without captain’s command, and the emergency landing gear extension was actuated by the flight engineer. But the airplane already touched the ground with the belly air brakes. Engine power was immediately reduced and reverse power applied. The airplane slid over 750 meters making contact with the belly air brakes, extended flaps, lower lugs of main landing gears, actuators and nose landing gear doors. All 7 crew members and 78 passengers could leave the airplane through the passengers door. Nobody was injured. There was no fire. Probable cause: The accident may be attributed to a mistake of one crew member, or by omitting landing gear extension, or by mixing up landing gear and flap control knobs.