After an uneventful go around, the pilot made a second approach but eventually decided to perform another go around due to difficulties in stabilising the helicopter. As he was making a turn to the right, the helicopter started a spin in a clockwise direction. Whilst the helicopter was spinning, it began to lose altitude and drifted in a northerly direction until it impacted the windscreen of a coach parked in the parking lot adjacent to Sung Wong Toi Road. At the time of the accident, one person was working inside the coach. There was no post-impact fire but the aircraft was damaged. The pilot, the helicopter passenger and the person inside the coach sustained minor injuries.
The investigation concluded the cause of the accident was that the helicopter during a downwind approach experienced a Loss of Tail Rotor Effectiveness (LTE) that resulted in the aircraft spinning to the right during a low airspeed tight turn to the right. This subsequently led to the total Loss of Tail Rotor Effectiveness due to a Vortex Ring State developing on the tail rotor disc.