As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZATION STARTED TO CLIMB @ 1000 FPM AT FL 310-C/A-FOUND NO PRESSURIZATION FAULTS ON CMC. PERFORMED CABIN PRESSURIZATION LEAKAGE FUNCTIONAL TEST IAW AMM 21-31-00-720-802, OPC GOOD NO LEAKAGE FOUND AT 2L DOOR. ITEM DEFERRED PER MEL. GOT ACCESS TO FORWARD AUTO DRAIN VALVE IN RT FWD GALLEY IAW AMM 25-23-10 & 38-31-04 AND REMOVED TRASH FROM DRAIN VALVE ASSY, NO MORE LEAKS NOTED. REMOVED AND REPLACED FWD DRAIN MASK IAW AMM 38-31-03, OPC GOOD