A plane involved in a fatal crash that killed four people working on improvements at Dubai International Airport had followed other larger aircraft landing there too closely as air traffic controllers offered inconsistent warnings about the hazard, a preliminary investigative report released Sunday found. The May 16 crash of the Diamond DA62 saw the aircraft roll upside-down in air and smash into a park near the airport at high speed, killing the three Britons and one South African on board, according to the report by the United Arab Emirates' General Civil Aviation Authority. The twin propeller-engine light aircraft first lost control in the wake of a Thai Airways Airbus A350 landing at Dubai's airport, the world's busiest for international travel.