Accident Boeing 777-222 N779UA,
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Date:Thursday 17 July 2003
Time:15:45 LT
Type:Silhouette image of generic B772 model; specific model in this crash may look slightly different    
Boeing 777-222
Owner/operator:United Airlines
Registration: N779UA
MSN: 26941/35
Year of manufacture:1996
Total airframe hrs:28617 hours
Engine model:Pratt & Whitney PW4077
Fatalities:Fatalities: 0 / Occupants: 270
Aircraft damage: None
Location:Chicago, IL -   United States of America
Phase: Unknown
Nature:Passenger - Scheduled
Departure airport:Denver International Airport, CO (DEN/KDEN)
Destination airport:Chicago-O'Hare International Airport, IL (ORD/KORD)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
A passenger sustained a broken ankle when the flight encountered moderate turbulence. The captain reported that the seat belt sign was on prior to entering a buildup. The captain stated, "However a passenger, ... had still not taken her seat. Apparently she had been in the lavatory when I turned on the seat belt sign, and was returning to her seat at the time of the encounter." An excerpt from an airline weather study stated, "Even though the main band of convective activity had passed the location of the incident, the possibility of a towering cumulus cell re-building behind the first band was indeed possible as the air mass was becoming gradually unstable again. ... Therefore, the pilot report of encountering a jolt of light turbulence followed by moderate turbulence is plausible."

Probable Cause: The turbulence encountered during the descent which seriously injured a passenger returning to her seat after the seat belt sign was activated. A factor was that it was not possible for the returning passenger to comply with the lit seat belt sign.

Accident investigation:
Investigating agency: NTSB
Report number: CHI03LA237
Status: Investigation completed
Duration: 10 months
Download report: Final report



History of this aircraft

Other occurrences involving this aircraft
4 February 2023 N779UA United Airlines 0 near Lincoln, NE unk


Revision history:

25-Mar-2024 10:15 ASN Update Bot Added

Corrections or additions? ... Edit this accident description

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