What was found
APU WON'T START PRIOR TO DEPARTURE. APU SPEED DID NOT REACH 7 PERCENT, CAUSED AUTO SHUT-DOWN, MUST ACCOMPLISH FIM 49-40 TASK 812, A BATTERY DISCHARGE OF APPROX 100 AMPS IS NECESSARY FOR ELECT. STARTER MOTOR TO TURN ABOVE 7 PERCENT SPEED, IF ELECT. STARTER MOTOR GETS LESS THAN 100 AMPS, THEN THE APU MAY NOT REACH 7 PERCENT SPEED AND THE CAUSE OF THIS MAINT. MESSAGE TO SHOW IS AN ELECTRICAL FAULT. START FIM 49-40 TASK 812 AT PARA "C".