What was found
(CAN) WHILE INVESTIGATING ENGINE OPERATION FUEL PRESSURE VARIANCES AND WHY A NEWLY REPLACED ELECTRIC PUMP WAS NOT WORKING ON THE LOW SETTING, A 3 VOLT VOLTAGE DROP WAS NOTED FROM THE MAIN ELECTRICAL BUSS INPUT FEED TO THE ELECTRIC BOOST PUMP. INVESTIGATION FOUND MILD CORROSION AND EVIDENCE OF HEATING ON THE "LINE" SIDE OF THE "BATTERY" 50 AMP CIRCUIT BREAKER. THE VOLTAGE LOSS PROBLEM WAS CORRECTED WHEN THE CIRCUIT BREAKER WAS REPLACED. ALL OTHER CIRCUIT BREAKERS AND THEIR ASSOCIATED CONNECTIONS WERE INSPECTED. NO OTHER BREAKERS WERE FOUND TO HAVE ANY DEFECTS.