Incident
at 92NM ENE MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)
A Jazz de Havilland DHC-8-402 (C-GBJZ/JZA7937) from Quebec/Jean-Lesage, QC (CYQB) to Montreal/Pierre-Elliott-Trudeau, QC (CYUL) declared "PAN PAN" due to a cargo door issue that was causing pressurization problems. No emergency declared; the aircraft descended to 6,000 ft and continued to its destination. JZA7937 landed without incident at 2125Z. No impact on operations.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. During cruise, the flight crew received a "FUSELAGE DOORS" red warning indication linked with the aft baggage door. A "PAN-PAN-PAN" was declared and the altitude was reduced. During the descent, the warning light went out. The flight continued to the destination airport and landed without further incident. During maintenance troubleshooting, the aft baggage door lock sensor fitted on the door handle housing was found to be out of limits. The sensor was adjusted and the system was tested serviceable before returning the aircraft to service.
UPDATE: TSB Report #A22Q0002: C-GBJZ, a Jazz Aviation de Havilland Dash 8-400 was on instrument flight rules flight JZA7937 from Quebec/Jean Lesage, QC (CYQB) to Montreal/Pierre Elliott Trudeau, QC (CYUL). En route, approximately 92 nautical miles (NM) east northeast (ENE) of CYUL, at an altitude of 14,000 ft ASL, an unsecured aft cargo door indication appeared. The crew initiated a descent to 8,000 ft, during which time the indication disappeared. An emergency (PAN PAN) was declared. The aircraft landed without incident at CYUL.