What was found
APU FAULT NO START APU WILL NOT START. WHILE INSPECTING APU FOUND BLOWN BOOT LT SIDE OF APU FROM SURGE VALE. FOUND APU COLD SOAKED, STARTER EXTREMELY HOT TO TOUCH. STRONG ODOR POSSIBLE STARTER ISSUE. *DM* REFERENCE FIM 49-11 FAULT TREE 875 AND DOCUMENT RESULTS. M/L UPDATED WITH A STARTER AS NEEDED. REMOVED AND REPLACED APU STARTER MOTOR REF AMM 49-41-01-402-013. COMPLETED MULTIPLE OPS CHECKS ON APU AFTER INSTALLATION. ALL OPS CHECKS GOOD. APU RUNS NORMALLY. NO FAULT SHOWING DURING BITE CHECK. FOUND NO DAMAGE TO BOOTS DURING INSPECTION.