What was found
SHORTLY AFTER LIFTOFF FROM SJC, WHEEL WELLS CIRCUIT BREAKER POPPED. CIRCUIT BREAKER WAS CHECKED JUST PRIOR TO DEPARTURE FROM SJC BY AMERICAN AIRLINES CONTRACT MAINT. NO PROBLEMS WERE NOTED. ALSO HAD PREVIOUS WRITEUP IN SLC. REPAIRS WERE MADE TO WIRING AT FWD NOSE W/W LIGHT ASSY. SLC MAINTENANCE FOUND DAMAGED AND BURNED WIRING BEHIND P18-3 CIRCUIT BREAKER PANEL. SUSPECTED SHORT CAUSED C/B TO POP AND WIRE BUNDLE TO BE DAMAGED (APPROX 20 WIRES). BURNT ELECTRICAL SMELL IN COCKPIT. REPAIRED WIRING.