As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A8 CHECK, ACTUATOR CONFIDENCE TEST LEFT WING SHUTOFF VALVE ON P61 VALVE CLOSED LIGHT WILL NOT EXTINGUISH. MAT SHOWS MAINT MESSAGE 27-17019. TROUBLESHOT CHECKED 28VDC POWER AT VALVE AT DV27100 3 AND 2 WITH GROUNDS AT 9 AND 1 AND CASE GROUND AT 8 ALL NORMAL. SUSPECT VALVE. REPLACED VALVE ACTUATOR ASSY, MESSAGE CLEARED. VALVE NEEDS LEAK CHECK AND OPS CHECK.