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| Date: | Thursday 13 February 2025 |
| Time: | |
| Type: |  Cessna 525B CitationJet CJ3+ |
| Owner/operator: | AirSprint |
| Registration: | C-GAAS |
| MSN: | 525B0567 |
| Year of manufacture: | 2018 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Location: | 50 nm NNE of Albany International Airport, NY -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Tampa International Airport, FL (TPA/KTPA) |
| Montreal-Pierre Elliott Trudeau International Airport, QC (YUL/CYUL) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
AirSprint flight ASP567, a Cessna 525B, was at the start of descent into YUL, passing through FL400, when the First Officer (FO) heard a loud hiss coming from the door. The FO immediately called for oxygen masks and the flight crew proceeded to put the oxygen masks on. The FO noticed the cabin altitude climb at a rate from 2500 fpm to 3500 fpm. The FO selected the mic to oxygen mask and began to execute an emergency descent and informed Boston center. Boston center cleared the aircraft to 8000'. The FO could not hear the captain through the intercom as they later found out his mic cord for his oxygen mask was not fully plugged in. During descent, the FO requested priority handling in the event they would have to divert. During the descent the crew identified a master warning 'cabin altitude' light come on. Once the crew leveled at 8000' the cabin pressure altitude matched the aircraft altitude, and they elected to take off the oxygen masks and put their headsets on. The crew noted that they had enough fuel to continue to CYUL. The flight then continued without further incident.
Sources:
TSB A25F0061
https://www.flightaware.com/live/flight/CGAAS/history/20250213/2123Z/KTPA/CYUL
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Feb-2025 19:46 | ASN | Added |
| 23-Feb-2025 19:49 | ASN | Updated [Date, Time, Aircraft type, Operator, Location, Country, Phase, Source, Damage, Narrative, ] |
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