What was found
CARGO MID LOOP B LIGHT ILLUMINATED ALONG WITH "SMK DET LOOP" AND MASTER CAUTION. DETERMINED LIGHT WAS FAULTY AND TO CONTINUE TO DESTINATION. WITHIN A FEW MINUTES "MASTER WARNING" "CARGO FIRE" AND CDSP "FIRE" LIGHTS ILLUMINATED ALONG WITH AURAL WARNING. PERFORMED MULTIPLE CARGO SMOKE SYSTEM CHECKS W/NO DEFECTS NOTED IAW SMM 26-16-00/26-22-00. NO EVIDENCE OF FIRE/SMOKE FOUND IN ANY CARGO COMPARTMENTS. R & R MID CARGO SMOKE DETECTORS. REPLACED METERING VALVE IN MID CARGO PIT IAW AMM 26-22-03. RESET LOOP A, LOOP B, AND CONTROL PANEL BREAKERS IAW CMM 26-16-00. PERFORMED CARGO SMOKE DETECTION SYSTEM ADJ/TEST PROCEDURE IAW MM 26-16-00. OPS CHECK GOOD. SYS TEST FLIGHT WAS ACCOMPLISHED AND SYS ARE ALL SATISFACTORY.