As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, N1 SETTINGS ON TAKE OFF PAGE DID NOT MATCH. ACFT GROUNDED. VERFIED LT PACK INTERMITTENTALLY TURNED ON- SHOWS ON FMC DISCRETE PAGE. DURING TROUBLESHOOTING NOTED FMC DISCRETE SHOWED LT PACK FLOW CONTROL VALVE ON WITH THE VALVE CLOSED. JUMPERED CONNECTOR D486L PIN 3 TO 1 GROUND AND DISCRETE TURNED TO OFF. REPLACED THE LEFT FLOW CONTROL AND SHUTOFF VALVE IAW MM 21-51-01. LEAK AND OPS CKS GOOD. TAXI OF ACFT SHOWED NO FURTHER DEFECTS.