What was found
CLIMBING THROUGH FL330, CARGO BAY FIRE LIGHT ILLUMINATED. CANCELED THE HORN & LIGHT, ONLY TO HAVE IT COME BACK ON SEVERAL TIMES. INITIATED A MODIFIED EMERGENCY DESCENT & LIGHT EXTINGUISHED & DID NOT COME ON AGAIN ONCE BELOW FL200. INSPECTED WIRE HARNESS AND CONNECTOR PINS WITH NO DEFECTS NOTED. PERFORMED INTEGRITY CHECK OF CARGO BAY FIRE DETECTION WITH NO DEFECTS NOTED. VERIFIED INTEGRITY FROM PT TEST SWITCH TO CIRCUIT BREAKER WITH NO DEFECTS NOTED. COMPLETE LOOP INTEGRITY CHECKED GOOD. REMOVED FAULTY INTERMITTENT SMOKE DETECTOR AND INSTALLED A REPAIRED UNIT IAW AMM 26-00-00. OPS CHECKED GOOD.