A Northwest Airlines Boeing 747-400, registration N676NW performing flight NW2 from Manila, Philippines, to Tokyo Narita, Japan, with 408 passengers and 14 crew, was in a holding pattern near Chiba, 40nm south of Narita, about 30 minutes before landing with seatbelt signs turned on, when the airplane encountered severe turbulence and suddenly dropped from its assigned altitude of 15000 feet.
A number of passengers, who had not fastened their seatbelts, were thrown out of their seats and hit the ceiling.
The crew reported about 2-3 injuries via radio, but did not declare emergency. The landing 30 minutes later at 12:19 local (03:19 GMT) was safe.
A total of 43 passengers were injured in the upset and were brought to hospitals. Initially reported two serious injuries turned out less severe. However, Japanese officials reported later, that one passenger received a serious injury (neck fracture).
Report by AVHerald