As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE PILOTS REPORTED AN BLEED AIR WARNING INDICATION. MAINTENANCE INSPECTED THE ACFT AND DISCOVERED THAT THE PRESSURIZATION CHECK VALVE ASSY WAS WORN THROUGH BY THE CHECK VALVES. THIS BLEED AIR LEAK CAUSED THE ENVIRONMENTAL TUBING, EVA TO FAIL WHICH TURNS ON THE WARNING LIGHT.