What was found
ON PUSH BACK #1 ENGINE HOT START. ITT REACHED 700 FOR APPROXIMATELY 1 SEC, FADEC ABORTED START, NO EICAS INDICATION. RAN CHECK LIST AND TRIED TO START AGAIN NO ROTATION ON ENGINE REMOVED FROM SERVICE. INTERROGATED CMC FOUND FAULT CODES 73216218E1A AND 7321618E1B. REF FIM 73-21-00-810-940-A, POWERED DOWN A/C FOR 8 MINUTES THEN POWERED BACK UP AND PERFORMED AUTOMATIC ENGINE START ON #1 ENGINE. DUE TO NO ENGINE ROTATION, ATTEMPTED SCV MANUAL OPERATION START, REF AMM 80-10-02-980-01-A. IN THE ATTEMPT THERE WAS NO ENGINE ROTATION AND SPARKS APPEARED AT THE STARTER VALVE OVERRIDE ACCESS HOLE. REPLACED THE AIR TURBINE STARTER PER E175 GE LMM 80-00-00-800-802, NO HELP. INTERROGATED CMC FOUND FAULT CODES 73216025E1A/E1B. REPLACED THE ATS VALVE REF E175 GE LMM 80-00-00-800-801. C/W GE TASK 72-00-00-810-803, SUBTASK 72-00-00-810-005. ENGINE NOW OPERATES NORMALLY. RETURNED TO SERVICE.