United Airlines Flight 328

United Airlines Flight 328 was a scheduled flight from Denver International Airport in Denver, Colorado, to Daniel K. Inouye International Airport in Honolulu, Hawaii. On February 20, 2021, the Boeing 777-222 (registered N772UA) operating the route suffered an engine failure while flying over Broomfield, Colorado. The airplane then returned to Denver International Airport.^[1][2]

United Airlines Flight 328

N772UA, the aircraft involved in the incident, photographed in 2014
Incident
Date	February 20, 2021 13:08 MST (2021-02-20UTC20:08Z)[1]
Summary	Nominally contained engine failure with parts departing aircraft and subsequent emergency landing; under investigation
Site	Over Broomfield, Colorado, U.S. 39.929°N 105.055°W / 39.929; -105.055
Aircraft
Aircraft type	Boeing 777-222[a]
Operator	United Airlines
IATA flight No.	UA328
Call sign	United 328
Registration	N772UA
Flight origin	Denver International Airport (DIA), Denver, Colorado
Destination	Daniel K. Inouye International Airport (HON), Honolulu, Hawaii
Passengers	231
Crew	10
Injuries	0
Survivors	241 (all)
Ground casualties
Ground injuries	0

The failure to the engine caused a fire in the engine damage to the aircraft's body.^[3]

Aircraft

The incident aircraft, N772UA, is a Boeing 777 which flies for United Airlines. It was built in November 1994 and given to United Airlines in September 1995.^[4] At first, the aircraft was a part of a test to approve its entry to fly commercially.^[4]

Investigation

As of July 25, 2021, the National Transportation Safety Board (NTSB) is looking into the incident. Debris was collected. The NTSB found that two blades on the engine were broken and the damage done to be the same as metal fatigue.^[5][6]

Notes

1. The airliner was a Boeing 777-200 model; Boeing assigns a unique code for each company that buys one of its airliners, which is applied as an infix to the model number at the time the aircraft is built, hence "777-222" designates a 777-200 built for United Airlines (customer code 22).