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| Date: | Thursday 26 September 2024 |
| Time: | |
| Type: |  Boeing 787-9 Dreamliner |
| Owner/operator: | United Airlines |
| Registration: | N27958 |
| MSN: | 36406/342 |
| Year of manufacture: | 2015 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Location: | 140 nm ESE of Churchill, MB -
 Canada
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Los Angeles International Airport, CA (LAX/KLAX) |
| London-Heathrow Airport (LHR/EGLL) | |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
United Airlines flight UA231, a Boeing 787-9 Dreamliner, was enroute at FL350 over Hudson's Bay when the captain's primary flight display and navigation display failed to a blank display and both flight management computers entered a degraded mode with limited capabilities. Lateral navigation (LNAV) was unavailable; however, heading and track select modes remained available, as was communication via VHF and SATCOM. An emergency was declared. The aircraft diverted to Chicago/O'Hare International Airport (KORD), IL, U.S., via alternate navigation and vectors, where it landed uneventfully.
Sources:
TSB
History of this aircraft
Other occurrences involving this aircraft
| 7 November 2015 | N27958 | United Airlines | 0 | Beaumont, Texas |  |
non |
| Turbulence | ||||||
| 4 July 2016 | N27958 | United Airlines | 0 | 26nm northeast of Sydney |  |
min |
| Bird strike | ||||||
| 3 July 2020 | N27958 | United Airlines | 0 | near Tokyo/Narita International Airport (NRT/RJAA) |  |
min |
| 27 March 2025 | N27958 | United Airlines | 0 | NE of Claveria |  |
non |
| Turbulence | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2024 17:07 | ASN | Added |
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