What was found
ON RETURN FROM IT`S FLIGHT, CREW REPORTED THE RT AUX FUEL PUMP NOT WORKING AND THE RT LANDING LIGHT BLOWING THE BREAKER. DURING THE TROUBLESHOOTING OF THE RT AUX PUMP, IT WAS FOUND THAT AT THE INTERSECTION OF FS 212.00 AND WS 40.00 THE WIRES THAT RUN ALONG THE AFT SIDE OF THE AFT SPAR HAD BURNED TO THE POINT OF 7 WIRES BREAKING APART. THE RT FIRE BOTTLE WAS FOUND EMPTY, AND IT IS BELIEVED THAT THE SHORTING IN THE BUNDLE SET OFF THE FIRE BOTTLE. THE WIRES WERE FOUND TO HAVE BEEN HANGING DOWN AND CHAFED ON A RIVET BELOW, CAUSING THE SHORTING (ELECTRICAL).