As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ISSUE: PACK 1-2 VALVE CLOSED MESSAGE AND PACK 2 WAS ALREADY DEFERRED RESULTED IN PRESSURIZATION ISSUES. CREW RETURNED TO BURBANK. CORR ACTION PACK1 DISCOVERED BLOWN OFF DUCT AND SLEEVE REINSTALLED OPS/LK CHECK GOOD. PACK2 DISCOVERED BLOWN OFF DUCT AND SLEEVE REINSTALLED OPS/LK CHECK GOOD. (HAS FLOWN 7 LEGS SINCE NO ISSUES)