What was found
DURING ENGINE START, NUMBER 1 ENGINE WOULD NOT START. TWO FAILED ATTEMPTS, ONCE ON IGN L & ONCE IGN R. ENGINE SPINS UP NORMALLY TO 25% N2, ONCE START LEVER IS ADVANCED MINIMAL EGT INCREASE TO ABOUT 200 DEGREES THEN ENGINE N2 & N1 DECELERATES. ABORTED ENGINE START CHECKLIST COMPLETED. GROUNDED - YES. DEBRIEFED AIRCREW, VERIFIED NO CIRCUIT BREAKERS EXTENDED, PERFORMED #1 ENGINE BITE CHECK WITH NO DEFECTS. REF B737-900 FIM 80-05 TASK 806. INSPECTED TURBINE EXHAUST FOR SIGNS OF ENGINE FAILURE, NO DEFECTS NOTED. PERFORMED #1 ENGINE START AND START FAILED, NOTICED #1 ENGINE FUEL SPAR VALVE LIGHT ON. CHECKED CIRCUIT BREAKER AND FOUND IT EXTENDED. RESET #1 ENG SPAR VALVE CIRCUIT BREAKER REF AMM 20-60-01-860-801 AND PERFORMED TWO ENGINE STARTS WITH NO DEFECTS. REMOVED AND REPLACED #1 ENGINE SPAR VALVE REF AMM 28-22-11. PERFORMED #1 ENG FUEL SPAR VALVE-ELECTRCAL CONTROL AND INDICATION TEST REF AMM TASK 28-22-00-710-801 OPS CHECK GOOD. C/B DID NOT POP.