# NTSB LAX96LA035: Boeing 747-122, N4714U, Pacific Ocean (Pacific Ocean), November 1, 1995 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: November 1, 1995 - Place: Pacific Ocean (Pacific Ocean) - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious, 300 uninjured - Status: Completed, report April 18, 1996 - Report: Approved by Office Director - NTSB case key (mKey): 29330 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX96LA035 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/29330/pdf - Page: https://openairdocs.org/ntsb/LAX96LA035 ## Probable cause the failure of the passenger to comply with the fasten seatbelt signs and the verbal directives of the flight and cabin crew. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Miscellaneous/other, cruise - weather condition - turbulence - procedures/directives - not followed, passenger (cause) ## Analysis 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. ## Factual narrative On November 1, 1995, at 1515 UTC, one passenger was seriously injured onboard United Airlines flight 830, during a moderate turbulence encounter over the Pacific Ocean. The aircraft, a Boeing 747-122, N4714U, was operated by United Airlines, Inc., as a regularly scheduled non-stop international passenger flight from Tokyo, Japan, to Honolulu, Hawaii. The accident occurred in international airspace between latitudes 28 - 33 degrees north and at longitude 173 degrees west, while the aircraft was in cruise at flight level 350. The aircraft was not damaged. The remaining 279 passengers, 18 flight attendants, and flight deck crew of three were not injured. The flight originated from Narita Airport, Tokyo, Japan, at 1037 UTC and subsequently landed at Honolulu, Hawaii, at 1721 UTC. Reports provided by the flight crew to the United Airlines Flight Safety Department stated that at the time of the accident the aircraft was in clear air. Convective activity associated with a front was visible in the distance ahead and on radar. The flight crew characterized the radar return as a solid yellow band across their flight course with an area of green return to the south. The flight crew elected to alter course to the south and follow a preceding Japan Airlines flight through the area of lighter returns. In response to a report of moderate turbulence from the preceding aircraft, the flight crew turned on the fasten seat belt sign about 1500 hours. Ten minutes later, because of turbulence, the cabin attendants were instructed to take their seats. During the period that the flight attendants were seated and the flight was encountering light turbulence, a female passenger in the upper deck lounge left her seat to go to the lavatory. According to reports by the flight attendants and other passenger witnesses, the flight attendants called to the English-speaking, American passenger to remain seated, but she declined and continued to the lavatory. While returning to her seat, moderate turbulence was encountered and the passenger fell in the aisle. The passenger complained of pain in her right leg and flight attendants, assisted by the second officer, immobilized her leg prior to helping her to a nearby seat. Two medical doctors aboard the flight talked with the passenger and paramedic personnel met the flight in Honolulu. Subsequent examination revealed multiple fractures of the passenger's right leg. ## Aircraft - Registration: [N4714U](https://openairdocs.org/deregistered/N4714U-1998-02-17), registration cancelled 1998-02-17, S/N 19876 (OpenAirDocs) - Reported make and model: BOEING 747-122 - Registry model: [Boeing 747-122](https://openairdocs.org/model/boeing-747-122) (registry code 1384872) (OpenAirDocs) - Category: Airplane - Serial number: 19876 - Airframe hours: 14672 - Engines: P&W JT9D-7AH 44000 lbs thrust turbo fan - Damage: No damage - Flight: Part 121 - Registered owner: United Airlines, Inc. - Airworthiness certificate: Standard, Transport - Last inspection: Continuous airworthiness, January 7, 1995, 2,404 hours before - Departed: RJAA, NARITA, OF - Destination: PHNL, HONOLULU, HI - Flight plan: IFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 56; airline transport; airplane ratings: multi-engine land; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 18,137 total, 2,123 in this make and model ## Weather - Conditions: Visual (VMC), Night/dark ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19951101041669A](https://openairdocs.org/incident/19951101041669A), Nov 1, 1995: Boeing 747122, Pacific Ocean, CA. Turbulence on flight. Seatbelt sign on passenger left seat to use lavatory. Leg was broken. ## Other investigations on N4714U (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB DCA85AA003](https://openairdocs.org/ntsb/DCA85AA003), Nov 16, 1984: Boeing 747-122 (N4714U), Honolulu, HI, substantial damage From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.