What was found
NR 1 ENGINE VALVE CLOSED OVERHEAD BLUE LIGHT OBSERVED TO BE IN THE BRIGHT BLUE ILLUMINATION STATE DURING PRE-FLIGHT. ENGINE NOT RUNNING. ACFT GROUNDED. RESET THE ENGINE FUEL NR 1 HPSOV INDICATOR CIRCUIT BREAKER ON THE P6-3 PANEL. VERIFIED THE DISCREPANCY, NR 1 ENGINE VALVE BLUE LIGHT FULL BRIGHT. PERFORMED FIM 73-06/804 THRU STEP F.(2)(D)1)A). REMOVED AND THE NR 1 ENGINE HMU IAW T/C N8473000, AND T/C N8473001 STEPS 1A THRU G(1)(11). ACCOMPLISHED STEPS 12-15 OF T/C N8473001. GROUND VERIFICATION CHECKED GOOD, NO LEAKS NOTED. NR 1 ENGINE VALVE CLOSED LIGHT OPS CHECKED NORMAL.