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| Date: | Sunday 3 August 2025 |
| Time: | 15:00 PDT |
| Type: |  de Havilland Canada DHC-8-402Q Dash 8 |
| Owner/operator: | WestJet Encore |
| Registration: | C-GENV |
| MSN: | 4553 |
| Year of manufacture: | 2017 |
| Engine model: | P&W Canada PW150 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Location: | 56 nm NNW of Cranbrook, BC -
 Canada
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Kelowna Airport, BC (YLW/CYLW) |
| Calgary International Airport, AB (YYC/CYYC) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
WestJet Encore flight WEN3162 a DHC-8-402Q, was en route at flight level 250, approximately 30 minutes after takeoff, when the flight crew observed a CABIN ALT master warning. The quick response checklist was actioned for a rapid de-pressurization and the pilot started an emergency descent. The flight crew declared a mayday and received vectors from ATC and were able to descend below 10 000 feet above sea level. The aircraft landed without further incident.
Maintenance replaced the pack flow control and shutoff valve, and pressurization checks were successfully carried out and the aircraft was returned to service.
Sources:
TSB A25P0109
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Sep-2025 18:29 | ASN | Added |
| 10-Sep-2025 18:31 | ASN | Updated [Aircraft type, Operator, Location, Phase, Nature, Damage, Narrative, ] |
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