C210 ACFT NEEDED AN ELECTRICAL EXTERNAL PWR FOR STARTING; FBO CLAIMED THERE WAS NONE AVAILABLE; FBO MECH TRIED JUMP FROM HIS TRUCK (12 VOLTS) WHICH CAUSED BURNED WIRING. IT WASN'T DISCOVERED UNTIL TKOF ROLL WHEN ACFT HAD COMPLETE ELECTRIC FAILURE. RPTR TAXIED BACK; MECH REPLACED WIRES; PROPER PWR CART WAS FOUND AND FLT CONTINUED NORMALLY.

Narrative

ON MAR/TUE/97 AT APPROX XX00 LCL; I PREPARED MY T210R FOR DEP FROM BOS. THE ACFT WOULD NOT START; SO THE FBO WAS REQUESTED TO SUPPLY EXTERNAL PWR. THEY DENIED HAVING THE REQUISITE 28 VOLT SOURCE. THE FBO'S MECH WAS DISPATCHED. THE MECH HOOKED UP JUMPER CABLES FROM HIS TRUCK BATTERY (12 VOLT) DIRECTLY TO THE ACFT BATTERY; BYPASSING THE ACFT EXTERNAL PWR SOURCE. UPON ATTEMPTING TO START THE ACFT; A PUFF OF SMOKE ENTERED THE COCKPIT FROM THE VICINITY OF THE MASTER SWITCH. THE MECH CHKED FOR DAMAGE BUT COULD NOT FIND ANY. THE FBO WAS RE-QUERIED REGARDING THEIR EXTERNAL PWR; AND IT TURNED OUT THAT THEY INDEED HAD A 28 VOLT GPU. AFTER SOME INITIAL FAILURES; THE ACFT WAS STARTED AND ELECTRICAL SYS AND AVIONICS APPEARED NORMAL. ON TKOF; THE ACFT HAD A COMPLETE ELECTRICAL FAILURE. THE TKOF WAS ABORTED AND ACFT TAXIED BACK TO THE RAMP. THE SAME MECH REINSPECTED AND DISCOVERED BURNT INSULATION ON WIRES FROM THE MASTER SWITCH. HE REPLACED THE WIRES AND EVERYTHING SEEMS BACK TO NORMAL. MECH MADE NO LOGBOOK ENTRIES.