What was found
VNAV DISENGAEGED AFTER TAKEOFF. WAS ABLE TO RENGAGE THROUGH ABT 7000 FEET PICTURE ATTACHED PERFORMED SENSOR STATUS CHECK ON BOTH FLIGHT MANAGEMENT COMPUTERS AND BOTH THE LEFT AND RIGHT FMC FAILED THE NETWORK FILE SERVER. FOLLOWED FIM 22-11 TASK D21. FOUND MSG 34-21122. PERFORMED FIM 34-21 TASK 827. VERIFIED POWER AT CONNECTOR D277 PIN 1 (115 VCA). VERIFIED CONTINUITY BETWEEN PINS 3&4 AT CONNECTOR D277 AND H8&J8 AT CONNECTOR D3687A. REMOVED AND REPLACED TOTAL AIR TEMP PROBE IRW AMM 34-21-06. BONDING CHECKS GOOD. OPS CHECKS GOOD.