What was found
BOTH AUTO PRESSURIZATION CONTROLLERS FAILED, PRESSURIZATION NOT CONTROLLABLE IN MANUAL MODE. R & R AFT OUTFLOW VALVE IAW AMM 21-31-03. OPS CHECKED FAILED ON PRESSURE CONTROL MODULE 2 BITE CHECK. CHECKED WIRES BETWEEN D10740A & D10734 OF OUTFLOW VALVE IAW FIM 21-31, TASK 805. FOUND ALL WIRES CHECKED HAVING CONTINUITY. SWAPPED PRESSURE CONTROL MODULES 1 & 2, SAME FAULT STAYED ON NR 2. FOUND NO GROUND AT CONTACT SMALL B- OF CONNECTOR D10734 ON OUTFLOW VALVE. TERMINATED THE WIRE W6204-5505-20 & INSTALLED PIN INTO GD3740-DC IAW SWPM 20-90-15. INSTALLED THE OUTFLOW VALVE IAW AMM 21-31-03. PERFORMED BOTH MANUAL MODE TEST & CABIN PRESSURE CONTROL SYSTEM GROUND TEST PER AMM 21-31-00. NO FAULTS NOTED.