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| Date: | Friday 23 December 1988 |
| Time: | 02:30 LT |
| Type: |  Boeing 747SP-21 |
| Owner/operator: | United Airlines |
| Registration: | N146UA |
| MSN: | 21547/325 |
| Year of manufacture: | 1978 |
| Engine model: | P&W JT-9D |
| Fatalities: | Fatalities: 0 / Occupants: 222 |
| Aircraft damage: | None |
| Category: | Accident |
| Location: | Midway Islands, PO -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Norita, OF (KNRT) |
| San Francisco International Airport, CA (SFO/KSFO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
UNITED AIRLINES FLT 820 WAS ENRTE FROM NORITA, JAPAN TO SAN FRANCISCO, CA. AT FLT LVL 380 SEVERE CLEAR AIR TURBULENCE WAS ENCOUNTERED. THREE CABIN CREW MEMBERS WERE THROWN TO THE CEILING, TWO OF WHOM WERE INJURED, ONE SUSTAINING A FRACTURED LEG. THE FLT DIVERTED TO HONOLULU AND LANDED WITHOUT INCIDENT. BOTH FLT AND CABIN CREW REPORTED THAT THERE HAD BEEN NO WARNING OF ANY IMPENDING TURBULENCE PRIOR TO ABRUPTLY ENCOUNTERING THE TURBULENCE THAT CAUSED THE INJURIES, AND THAT THE SEAT BELT SIGN WAS TURNED OFF.
Probable Cause: AIRCRAFT'S ENCOUNTER WITH UNFORECAST SEVERVE CLEAR TURBULENCE.
Accident investigation:
 |
|
Sources:
NTSB LAX89LA068
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2024 14:03 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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