As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SBP - FLT 3074 - CARGO SMOKE LIGHT CAME ON AT 1,000 FEET ALTITUDE. DISCHARGED NR 1 FIRE BOTTLE. RETURNED TO AIRPORT. REPLACED RIGHT CARGO FIRE EXTINGUISHER IAW S340 AMM 26-23-10. VISUALLY INSPECTED CARGO SMOKE DETECTORS, NO DISCREPANCIES NOTED. AIRCRAFT RETURNED TO SERVICE. (X)