What was found
APU RELIABILITY COLD START ACCOMPLISHED ON FLT LEG ILN-ONT. SAT-59, FL 360. START UN-SUCCESSFUL ON 3 START ATTEMPTS.(<P>APU BITE SHOWS "A/C START CIRCUIT" FAULT FOR PREVIOUS 3 ATTEMPTS. FIM 49-11 FAULT TREE 962, FOUND SUSPECT TERMINALS AT APU START MOTOR AT BLOCK 20. REMOVED AND REPLACED APU STARTER IAW AMM 49-41-01, TEST OK.