What was found
FUEL BOOST SWITCH IS PART OF SB 35/36-28-11. THE SWITCH HAS AN INTEGRAL LIGHT. THE TWO WIRES FOR THE LIGHT ENTER THE SWITCH IN SUCH A WAY THEY CHAFE AT THE POINT WHERE THEY ENTER THE SWITCH. THIS CREATED A DIRECT SHORT TO GROUND OF THE POWER WIRE FOR THIS LIGHT. AS A RESULT, THE BOOST PUMP CIRCUIT BREAKER TRIPPED IF THE PUMP WAS TURNED ON. ALSO, BOTH WARNING LIGHT CIRCUIT BREAKERS TRIPPED IF THE ANNUNCIATOR PRESS-TO-TEST SWITCH WAS PRESSED. THIS HAPPENED ON THE GROUND DURING A PRE-FLIGHT.