On Thursday 19 November 2015 about 16:30 hrs. AMT-SC rigger heard the sound like some object fall down from sky high while raining with strong wind then, He observed the Roof Turbine Vents laid on the concrete surface for away from beside of warehouse building about 10 meters. The Roof Turbine Vents(3 kgs weight) was fell down(10 meters height) from Top roof of warehouse. QHSSE Manager inform to SCOS base manager after that the construction team arrived warehouse at 20:30 hrs. They were using metal sheet with screws to cover the hole on top roof. Construction supervisor take the Roof Turbine Vent back to discuss with the manufacturer. This near miss nobody get hurt.