As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EQUIP COOLING VALVE LIGHT ILLUMINATED. MOVED EQIP COOLING SWITCH FROM AUTO TO STBY VALVE ANNUNCIATOR LIGHT EXTINGUISES. THEN MOVE TO OVRD WITH PACK SWITCHES IN THE OFF POSITION.WARNING SOUNDS. RESET C/B THEN MOVED THE SWITCH BACK TO AUTO.NO VALVE LIGHT OR EICAS MESSAGE. MCC ADVISED.CONTINUED ON ITEM 2. PER FIM 21-58-FT 887.