ON DEPARTURE, OUR AIRPLANE WAS NOT PRESSURIZING. WE CONTINUED TO CLIMB, AND AT ABOUT 3500 FEET. THE AIRPLANE STARTED TO RAPIDLY PRESSURIZE. WHEN IT HIT A NEGATIVE ALTITUDE, I SELECTED MANUAL, WITH THE RATE KNOB AT ZERO, AND THEN IT GOT VERY HOT IN THE COCKPIT, AND LIGHT SMOKE IN THE CABIN, AND THE AIRPLANE CONTINUED TO OVER PRESSURIZE. TWO THINGS WERE NOTED BEFORE I SELECTED MANUAL, THE PRESS CONT BUTTON HAD "FAIL" ILLUMINATED AND THE FAULT LIGHT WAS ILLUMINATED. TO STOP THE AIRPLANE FROM OVER PRESSURIZING, (NOW AT -2000 FEET CABIN ALTITUDE AND STILL COMING DOWN AT ROUGHLY 3-4000' A MINUTE). I TURNED BOTH PACKS OFF AND PRESSED THE DEPRESS BUTTON. NOW SITTING HERE ON THE GROUND, IF DEPRESS IS DESELECT SELECTED, AND THE PACKS ARE TURNED ON THE AIRPLANE WILL PRESSURIZE ON THE GROUND. THE CONTROL FAULT LIGHT IS STILL ILLUMINATED, AND THE FAIL LIGHT IN THE PRESS CON BUTTON IS STILL SHOWING. AND WITH IT SELECTED IN AUTO, WE HAVE AN AUTO PRESS, AMBER CAS GAINED ACCESS TO AIRCRAFT. REMOVED PANEL 131AL AND INSPECTED CPC/CPAM WITH NO DEFECTS. PERFORMED SELF TEST OF CPC WITH NO DEFECTS OF FAULT LT, SELF TEST OPS CHECK GOOD, PRESSURIZED AIRCRAFT IN MANUAL MODE WITH NO DEFECTS NOTED. PERFORMED A MDC DOWNLOAD & SENT TO MCC. MAINTENANCE PERFORMED 21-00-00 AND SMARTFIX AMBER AUTO PRESS 21-31-00. REMOVED COPILOT SIDE PANEL TO ACCESS COCKPIT FAN/SENSOR UNIT. REMOVED SCAT TUBE FROM UNIT AND VACCUMED HOSE, CLEANED, CLEANED CONNECTOR. REINSTALLED HOSE AND CONNCTOR. REINSTALLED COPILOT€™S SIDE PANEL. PERFORMED OPERATIONAL CHECK OF THE TEMPERATURE CONTROL AND INDICATION SYSTEM. COCKPIT TEMP WAS ABLE TO BE CONTROLLED FRO COLD TO HOT. OPS CHECK GOOD. PERFORMED IAW BOMBARDIER AMM CH 21-61-19-000-801 AND 21-61-00-710-801. OSD: 4/7/2026
| Incident date | April 3, 2026 |
|---|---|
| Airline | DXTA |
| Flight | CH21 |
| Aircraft | CNDAIR CL6002B16 |
| Registration | N216QS |
| Affected area | Cockpit |
| Event type | Smoke |
| Verification | Official |
Sources
- FAA SDR: DXTA smoke report on 2026-04-03 (external.apic4e.faa.gov)
This entry summarizes publicly reported information and links to the original reporting or official record. Details can change as authorities and operators release additional information.