As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK ON PREV MCO AS BEING INOP. DURING CLIMBOUT OF JAX CABIN TEMPS RAN HOT. UNABLE TO DECREASE CABIN TEMPS BELOW 90 DEGREES. FOUND RIGHT PACK TRIM AIR CHECK VALVE IMPROPERLY POSITIONED WHICH WAS ALLOWING LEFT PACK AIR TO PASS THROUGH THE RIGHT ACM. RIGHT PACK IS INOP AND CAUSED THE HI CABIN TEMPS. REPOSITIONED CHECK VALVE AND NO RIGHT PACK REMAINS ISOLATED FROM LEFT.