What was found
AT FL 360 GOT A CABIN ALTITUDE MASTER WARNING. CABIN WAS SHOWING JUST OVER 10,000 FT WITH A 200 FT PER MIN CLIMB. WE WENT TO AUTO 2 BUT CABIN CONTINUED TO CLIMB, COMPLIED WITH QRH. ON DESCENT WE TRIED MANUAL & WERE ABLE TO CONTROL THE CABIN ALTITUDE. TROUBLESHOOTING IAW FIM 21-31 FAULT TREE 803 BITE. CHECKED LT & RT AUTOMATIC PRESS CONTROLLERS, BOTH CONTROLLERS SHOWED AC POWER OFF ON LAST FLIGHT. BITE & PRESS TEST ON LT & RT CONTROLLERS SHOWED NO INFLOW ON PREVIOUS FLIGHT. CONTROLLERS TEST NORMAL WITH NO CURRENT FAULTS. CABIN PRESS CONTROL SYS ADJUSTMENT & TEST IAW AMM 21-31-00-5, SATISFACTORY. AWAITING PARTS. R & R CABIN PRESS SELECTOR IAW AMM 21-31-01-4. OPERATIONS CHECKED GOOD. R & R AUTOMATIC CABIN PRESS CONTROLLER NR 1 IAW AMM 21-31-02-4. R & R CABIN PRESS OUTFLOW VLV IAW AMM 21-31-03-2. ACCOMPLISHED CABIN CONTROL SYS ADJUSTMENT & TEST IAW AMM 21-31-00-5. OK FOR SERVICE.