Individually Owned: 151,845
Corporate Owned: 143,699
Aircraft Accident/Incident Report
Pacific Ocean
Tuesady, October 17, 1995 9:44 GMT
NTSB Narrative Summary Released at Completion of Accident
Six passengers were injured during a severe turbulence encounter over the Pacific Ocean while the aircraft was in cruise at flight level FL330. The accident occurred in international waters near latitude 40 degrees north, longitude 152 degrees east. Review of the forecasts and pilot reports of the dispatch/weather package given to the flight crew prior to departure disclosed that an area of light to moderate turbulence was forecast along the aircraft's planned track from 151 to 162 degrees east longitude. Pilot reports available at the time of departure consistently reported smooth conditions in the area of the forecast turbulence. At the time of the encounter the aircraft was in clear air above a cirrus cloud deck. The crew saw no convective activity ahead either visually or on radar. In the process of preparing for a position report to air traffic control, the flight crew overheard another airline flight ahead of them reporting an encounter with moderate to severe turbulence. The captain decided to secure the cabin as a precaution. The purser was notified of the decision and the captain was in the process of reaching for the seat belt sign when the turbulence was encountered. All of the injured passengers were located aft of row 50, with the majority aft of row 58. None of the injured were secured by seat belts.
NTSB Probable Cause Narrative
an inadvertent encounter with unreported and unforecasted severe turbulence. A factor in the accident was the passengers' non-use of seat belts during cruise flight.
Event Information
| Type of Event | Accident |
| Event Date | 10/17/1995 |
| Event Day of the Week | Tuesday |
| Time of Event | 944 |
| Event Time Zone | -- |
| Event City | PACIFIC OCEAN |
| Event State | PACIFIC OCEAN |
| Event Country | -- |
| Zipcode of the event site | |
| Event Date Year | 1995 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | |
| Event Location Nearest Airport ID | |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Full |
| Investigator's weather source | Pilot |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Night/Dark |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 100 |
| Air Temperature at event time (in degrees celsius) | -44 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 260 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 5 |
| Injury Total None | 331 |
| Injury Total Serious | 1 |
| Injury Total All | 6 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1935 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Oct 17 1995 12:00AM |
| NTSB Notification Time | 815 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 7 2000 4:39PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N191UA |
| NTSB Number | LAX96LA013 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | None |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Boeing |
| Aircraft Model | 747-422 |
| Aircraft Series Identifier | 747-422 |
| Aircraft Serial Number | 26880 |
| Certified Max Gross Weight | 875000 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 441 |
| Number of Engines | 4 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Sep 10 1994 12:00AM |
| Airframe hours since last inspection | 5596 |
| Airframe Hours | 11793 |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | UNITED AIRLINES, INC. |
| Aircraft Owner Street Address | P.O. BOX 66100 |
| Aircraft Owner City | CHICAGO |
| Aircraft Owner State | IL |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 60666 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | UALA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | International |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | VHHH |
| Departure City | HONG KONG |
| Departure State | OF |
| Departure Country | |
| Departure Time | 516 |
| Departure Time Zone | GMT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | KSFO |
| Destination City | SAN FRANCISCO |
| Destination State | CA |
| Destination Country | |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |