A Boeing 767-346ER, operated as JL/JAL93 from Tokyo/Haneda to Seoul/Gimpo experienced turbulence while descending through 16000 ft at 95km southeast of Gimpo airport. Seven crew out of 12 suffered injuries, and three passengers among 218 felt out of sorts. One cabin crew was diagnosed with serious injury of two-week hospitarization. PROBABLE CAUSES In this accident, it is highly probable that the aircraft was strongly shaken because it encountered turbulence when flying at around 16,000 ft, causing cabin crewmembers thrown into the air to hit the ceiling, and one of them fell onto the floor on her back to sustain a severe injury. It is highly probable that the turbulence the aircraft encountered was caused by the redeveloped convective clouds after once shrinking. It is probable that the pilots were unable to capture the echoes of the convective clouds in their early developing stages which existed in its flight direction (forward and downward of the aircraft) due to having set the antenna tilt angle of the airborne weather radar to auto mode.