As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5810 - MEM-LFT, ON CLIMB-OUT, CREW RECEIVED CARGO SMOKE WARNING. DETERMINED THAT THIS WAS A FALSE WARNING. PER MAINTENANCE CONTROLS INSTRUCTION AIRCRAFT RETURNED TO MEMPHIS WITH UNEVENTFUL LANDING. REMOVED AND REPLACED TEST SWITCH. SYSTEM OPERATIONALLY CHECKED GOOD. (M)