What was found
AC WOULD NOT PRESSURIZE REMOVED AND REPLACED AFT OUTFLOW VALVE AND PERFORMED OPS CHECKS IAW B737-800 AMM 21-31-03-400-801, NO FAULTS FOUND. ACCOMPLISHED BY V937875. ADD EMP:V937875 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1091266 SN OFF 3101 REMOVED AND REPLACED AFT OUTFLOW VALVE AND PERFORMED OPS CHECKS IAW B737-800 AMM 21-31-03-400-801, NO FAULTS FOUND. ACCOMPLISHED BY V937875. ADD EMP:V937875 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1765572 SN OFF 9801 INDICATOR, CABI OFF 29-3111-9-0001 3101 ON 29-3111-9-0001 5437 VALVE, AIR, CAB OFF 29-2131-9-0007 9801 ON 29-2131-9-0007 8522