As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN RATE OF CLIMB/DESCENT TEMPORARILY INTERMITTENT OPERATION DURING CLIMB IN BOTH 'STANDBY' AND 'MANUAL' MODE. OUTFLOW VALVE WOULD NOT MOVE IN 'MANUAL' MODE. REPLACED OUTFLOW VALVE P/N 763810-2 AND CABIN PRESSURIZATION CONTROLLER P/N 7110033 AS REQUIRED BY MM 21-31. GROUND OPERATIONAL CHECKS AS PER BMM 21-31-0 NORMAL. (M)