What was found
CREW REPORTED, STANDBY INVERTER STATUS MESSAGE WHEEL WELL FIRE AT 90-100 KNOTS (EICAS-FIRE BELL) 3 SECONDS. LANDING WAS WITHOUT INCIDENT AND NO ADDITIONAL PRECAUTIONARY ACTIONS. WIRING CHECKS ON STANDBY POWER SYSTEM PER BOEING 767 WIRING DIAGRAM MANUAL 24-33-11 AND SUPPLEMENTAL MAINTENANCE MANUAL 24-54-04 SATISFACTORY. NO FAULTS FOUND. SUBSEQUENT TO AN INTEGRITY CHECK OF P5 PANEL, LINE MAINTENANCE REPORTED SHORT IN S1 SWITCH GOING FROM AUTO TO OFF CAUSING THE WHEEL WELL FIRE AND STANDBY INVERTER MESSAGE TO DISPLAY. STANDBY POWER OVERHEAD PANEL REMOVED AND REPLACED. OPERATIONAL CHECK GOOD.