As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT TEST ACFT CABIN COULD NOT PRESSURIZE. CABIN ALTITUDE CLIMBED AT A RATE OF 1800 FT ABOVE FLIGHT LEVEL 15000 FT. 06/28/09 SAFETY VALVE REPLACED, TESTED IAW AMM. PERFORMED CHECK FLIGHT WITH NO PROBLEMS AT FL280 CABIN ALT 3400, DELTA P 8.1 AT FL350 CABIN ALT 5400, DELTA P 8.5 AT FL410 CABIN ALT 7000, DELTA P 8.7.