As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE UPPER DECK CARGO SMOKE WARNING LIGHT CAME ON. NO SMOKE OBSERVED ON WALK THROUGH. CREW CONTINUED NORMAL OPERATIONS. REMOVED AND REPLACED CONTROL AMPLIFIER AND NR 6 SMOKE DETECTOR. OPS CHECK GOOD. AIRCRAF WAS RELEASED FOR SERVICE. (M)