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| Date: | Monday 31 March 2025 |
| Time: | 17:20 UTC |
| Type: |  Boeing 737-8CT (WL) |
| Owner/operator: | Westjet |
| Registration: | C-FCSX |
| MSN: | 60126/5106 |
| Year of manufacture: | 2014 |
| Engine model: | CFMI CFM56-7B |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | Unknown |
| Location: | over Oregon -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Vancouver International Airport, BC (YVR/CYVR) |
| Phoenix-Sky Harbor International Airport, AZ (PHX/KPHX) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Westjet flight WS1770, a Boeing 737-800 was en route when the first officer became incapacitated. The captain declared a medical emergency and initiated a return back to the departure airport, Vancouver International Airport, BC (YVR). Aircraft landed uneventfully.
Sources:
TSB A25F0142
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Apr-2025 07:52 | ASN | Added |
| 11-Apr-2025 07:55 | ASN | Updated [Aircraft type, Cn, Country, Phase, Nature, Narrative, ] |
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