What was found
PDIS: AFTER DEPARTURE, CLIMBING THROUGH 8000 FT RECEIVED "CABIN RATE" ALERT. LEVELED AT 10,000 FT THEN RECEIVED " CABIN ALTITUDE ALERT. REFER TO QRH PROCEDURE, NO CHANGE. A/C PRESSURIZED TO OUTSIDE PRESSURE AT 10,000 FT THROUGH LANDING. OUTFLOW VALVE SHOWED FULL CLOSED. ALL PACKS ON, ECON OFF, NO CHANGE. PERFORMED FAULT REVIEW OF BOTH CPC'S AND FOUND OFV MOTOR LOGGED. REMOVED AND REPLACED OFV DRIVE MOTOR REF M/M. OPS CKS AND R-T-S OF BOTH CPC'S. ALL INDICATIONS NORMAL, OK FOR SERV. PERFORMED ERASE MAINT MEMORY OF BOTH CPC'S.