What was found
REC'D A LEVEL 3 "AFT CARGO FIRE" WARNING. PERFORMED QRH IMMEDIATE ACTIONS. DISCHARGED BOTTLE, LANDED WITHOUT WARNING ILLUMINATED. AFT ABK INDICATION OF FIRE. COMPLIED WITH MTSI 26-10/6387, INSP OF CONNECTOR PLUGS AND REMOVED AND REPLACED AFT AND CENTER CARGO SMOKE DETECTORS, REF TSI FOR PARTS INSPECTED ABK CARGO, NO EVIDENCE OF FIRE. REMOVED AND REPLACED LWR CARGO FIRE EXTINGUISHER BOTTLE, REF MTSI 26-10-6387 FOR SMOKE DETECTORS REPLACEMENT. ACFT OK FOR SERVICE.