What was found
LEVEL 3 CABIN ALTITUDE ALERT WHILE PASSING 17,000 ON DEPARTURE. CABIN ALTITUDE UP TO 11,700 BEFORE DESCENT BELOW 10,000. LEVEL 1 CABIN DOOR FWD RT ALERT BELOW 10,000. LANDED WITHOUT INCIDENT. REPLACED OUTFLOW VALVE. REF 21-31-20. TESTED NORMAL, NO FAULTS NOTED. R & R NR 2 CABIN PRESSURE CONTROLLER REF MM 21-31-04-4-0. R & R RELAYS R2-5019, R2-5009 & R2-5744. REF IPC 24-51-51-01, 24-51-52-01 & 24-51-51-01. RTS ON BOTH CABIN CONTROLLERS GOOD.