Northwest Airlines Flight 2 Turbulence Incident (N676NW)

Incident Overview and Investigation Authority On February 20, 2009, a Boeing 747-400 registered as N676NW, operated by Northwest Airlines Incorporated, was en route from Manila Ninoy Aquino International Airport to Narita International Airport as scheduled Flight 2. Around 11:45 Japan Standard Time, the aircraft encountered turbulence at an altitude of approximately 30,300 feet, located about 174 kilometers south-southwest of Narita International Airport. The Japan Transport Safety Board (JTSB) conducted the investigation, although the United States National Transportation Safety Board (NTSB) initially held jurisdiction as the state of registry before entrusting the investigation to JTSB on March 6, 2009. The investigation was conducted in accordance with Annex 13 to the Convention on International Civil Aviation, with the objective of determining causes and preventing future accidents rather than apportioning blame or liability.