What was found
AT 500 FT ON DEPARTURE, EICAS MSG, TAT PROBE APPEARED WITH A/T DISCONNECT. L TAT ANNOUNCED ON OVERHEAD PANEL. BOTH TAT PROBE & LAT AT MSG, DISAPPEARED AFTER LANDING. INSPECTED WIRING IAW WIRING DIAGRAM 30-33-11 PAGE 2 FOUND K203 RELAY WITH ONE WIRING BROKEN BEHIND OF K203 BASE RELAY. SMT S SYS IAW WIRING DIAGRAM 30-33-11PAGE 2. FOUND ONE WIRE BROKEN AT SYS 2 AIR & GND RELAY K203, WIRE B3, REPAIRED WIRE, RAN TEST IAW AM 30-33-00-5-0 ALL TESTS PASSED. ACFT BACK TO SERVICE.