Boeing 777-222 accident near Narita, Jp, July 5, 2012
On July 5, 2012 at about 5:22 am local time, a Boeing 777-222, registered N224UA, was involved in an accident during enroute near Narita. It was flown under scheduled airline rules (Part 121). 1 person was seriously injured and 3 people had minor injuries; 252 others were unhurt.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 5, 2012 · about 5:22 am local time
- Place
- Narita, Japan · map
- Type
- Accident
- Injuries
- 1 person was seriously injured and 3 people had minor injuries; 252 others were unhurt.
- Weather
- not recorded
- Aircraft
- Boeing 777-222 · all 777-222s on the register
- Registration
- N224UA · registry record · serial 30225
- Damage
- Not recorded
- Flight
- Flight · scheduled airline rules (Part 121)
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Turbulence encounter during enroute defining event
The aircraft
- Seats: 400
- Landing gear: fixed
- Operator: United Air Lines INC
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Cabi | 1 | 3 | 6 | |
| Flight crew | 2 | |||
| Passengers | 244 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.