ASN Wikibase Occurrence # 308488
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| Date: | Friday 10 February 2023 |
| Time: | 16:54 |
| Type: |  Boeing 737-48E |
| Owner/operator: | Air North Charter |
| Registration: | C-FANB |
| MSN: | 25764/2314 |
| Year of manufacture: | 1992 |
| Fatalities: | Fatalities: 0 / Occupants: 107 |
| Aircraft damage: | None |
| Location: | 108 nm N of Vancouver, BC -
 Canada
|
| Phase: | En route |
| Nature: | Passenger |
| Departure airport: | Vancouver International Airport, BC (YVR/CYVR) |
| Whitehorse-Erik Nielsen International Airport, YT (YXY/CYXY) | |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
An Air North Charter & Training Limited Boeing 737-400 was conducting flight AN542 from Vancouver International (CYVR), BC, to Whitehorse International (CYXY), YT, with 5 crew and 102 passengers onboard. While in cruise altitude of 32 000 feet above sea level (ASL), the flight crew noted that cabin altitude was approaching 10 000' ASL. An emergency descent was initiated, and masks were donned. During the descent, a cabin altitude warning horn sounded. The flight crew declared a PAN PAN with air traffic control and they were given radar vectors to return to CYVR. The flight crew began the rapid depressurization checklist from the quick reference handbook (QRH). While completing the checklist, the flight crew discovered that the engine bleed valves had not been switched on during the after take-off checklist. With the bleed valve switch selected on, the flight crew levelled off at 14 000 feet ASL, pressurization was regained and the cabin altitude began to descend. The PAN PAN was cancelled and, after a discussion with the cabin crew and fuel calculations, the flight crew received a new ATC clearance to continue the flight to CYXY. There were no injuries and the flight continued without further issues.
Sources:
TSB
https://www.flightradar24.com/data/aircraft/c-fanb#2f27a1e4
Revision history:
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