What was found
DURING MX TROUBLESHOOTING, CSS FAILED, FAULT LIGHT. FOUND FAULT CODE 49-41011. NO FLAME SHUTDOWN. MADE 2 START ATTEMPTS WITH NO EGT RISE NOTED, FAULT LT ILLUM AND FAULT CODE 349-41011. LATCHED ON EACH ATTEMPT. ACCOMP. FIM TASK 49-40, TASK 802, FOR MAINT. MESSAGE 49-41011, STEPS A- F (3). REPLACED IGNITER PLUG, REF STEP F(4), NO HELP. REPLACED IGNITER LEAD, REF STEP F(5), NO HELP. REPLACED IGNITION UNIT REF STEP F(6). APU STARTS SUCCESSFUL, MAINT MESSAGE DOES NOT SHOW FOR LAST APU CYCLE. STARTED APU AGAIN, NO MESSAGE. GROUND OPERATION CHECKED GOOD.