What was found
PBI - FLT 888 - AFTER TAKEOFF, THE FOLLOWING OCCURRED: 1. PROXIMITY SWITCH SYSTEM INOPERATIVE. 2. CAB PRESSURE CTL CHAN. 3. GROUND FLT CONTROL. 4. AFCAS MAINTENANCE REQ. 5. NR 2 YAW DAMPENER AND FLIGHT DIRECTOR INOPERATIVE. 6. THREE-CHIME TAKEOFF CONFIGURATION WARNING, UNABLE TO CANCEL. CORRECTIVE ACTION: PERFORMED OPS CHECK ON AC CONTROL SYSTEM. NO FAULTS. REMOVED AND REPLACED NR 2 GCU IAW FMM 24-21-02, OPS NORMAL. OPS CHECK GPCU FAILED. REMOVED AND REPLACED GPCU IAW FMM 24-41-00, OPS NORMAL ON GROUND. NO FAULTS. (X)