United Airlines Flight 830
Boeing 747-122 · Accident en route
From Narita International Airport (RJAA) to Daniel K. Inouye International Airport (PHNL)
Event
- NTSB case
- LAX96LA035
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- Airline
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Boeing 747-122
- Aircraft type
- Boeing 747
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N4714U
- Operator
- United Airlines
- Onboard fatalities
- Unknown
- Route
- From Narita International Airport (RJAA), NaritaTo Daniel K. Inouye International Airport (PHNL), Honolulu, HI
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 121: Air Carrier
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Miscellaneous/other
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- None
Cause areas
- Passenger › Procedures/directives, not followed
Not plotted · Location withheld: coordinates are missing, conflicting, invalid, or have no accepted acquisition method. No substitute location has been invented.
NTSB narrative
As the flight approached an area in which preceding flights had reported moderate turbulence, the flight crew turned on the fasten seatbelt sign, announced the impending turbulence to the cabin, and instructed the flight attendants to be seated. While the fasten seatbelt sign was on, a female, English-speaking passenger, left her seat and went to the lavatory despite a verbal warning from a flight attendant about the eminent turbulence. As the passenger was exiting the lavatory the flight encountered moderate turbulence and the passenger fell to the floor. The passenger complained of pain in her right leg. Cabin and flight crew personnel stabilized her leg and helped her to a nearby seat. Post-flight medical examination revealed that the passenger had suffered multiple fractures of the right leg and foot.
Probable cause
the failure of the passenger to comply with the fasten seatbelt signs and the verbal directives of the flight and cabin crew.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX96LA035
- Event ID
- 20001207X04870
- Case number
- LAX96LA035
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (5)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status, damage. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 893f567da33b0fb295eda26d1d9b9d14781aaa2b366a56a661dc1eaea1f2018e; retrieved 2026-09-18T17:56:48.184Z.
- The NTSB's operator name is blank for N4714U; the operator shown is the name the NTSB's other records give its FAA operator code, UALA.