ASN Wikibase Occurrence # 348647
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| Date: | Wednesday 1 November 2023 |
| Time: | 13:47 UTC |
| Type: |  Bombardier DHC-8-402Q Dash 8 |
| Owner/operator: | Porter Airlines |
| Registration: | C-GKQB |
| MSN: | 4359 |
| Year of manufacture: | 2011 |
| Fatalities: | Fatalities: 0 / Occupants: 74 |
| Aircraft damage: | None |
| Location: | 80 nm NE from Toronto, ON -
 Canada
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Toronto City-Billy Bishop Airport, ON (YTZ/CYTZ) |
| Montreal-Pierre Elliott Trudeau International Airport, QC (YUL/CYUL) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Porter Airlines flight POE2461, a DHC-8-402Q Dash 8, suffered a cabin pressurization issue after departure from from Billy Bishop Toronto City Airport (CYTZ), ON.
During the initial climb, the flight crew noticed a lag of 0.6 PSI in differential cabin pressure; the climb was continued. Upon actioning the 10 000 feet checks, the differential cabin pressure was still noted a bit lower than normal, lagging by approximately 0.4 to 0.6 PSI. The flight crew subsequently noted that the rate controller was locked at 250 Feet Per Minute (FPM) instead of 500 FPM in normal condition and elected to continue the climb to FL250. Shortly after level off, the Cabin Press warning light came on with a differential cabin pressure indication of 4.8 PSI and the cabin altitude at approximately 11 000 feet. The flight crew subsequently donned oxygen, declared Mayday and initiated an emergency descent to 10 000 feet. The quick reference handbook (QRH) checklist was actioned. After leveling at 10 000 feet, the crew continued an unpressurized descent for an Instrument Landing System (ILS) landing into CYUL runway 06R where the aircraft landed without further incident. The maintenance crew were unable to replicate the fault, the pack flow control and shutoff valve were replaced, and the aircraft was returned to service.
Sources:
TSB A23O0144
History of this aircraft
Other occurrences involving this aircraft
| 6 July 2015 | C-GKQB | Porter Airlines | 0 | Toronto-Billy Bishop Airport, ON (YTZ/CYTZ) | |
min |
| Cowling loss | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Dec-2023 12:31 | harro | Added |
| 06-Dec-2023 12:31 | harro | Updated [Other fatalities] |
Corrections or additions? ... Edit this accident description
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