What was found
NR 2 FIRE LIGHT ILLUMINATED VERY BRIEFLY WITH THE FIRE AUDIO, A FEW SECONDS LATER CAME ON FOR A LONGER DURATION - APPROX. 10 SEC. BROUGHT NR 2 THROTTLE BACK TO IDLE AND PREPARED TO EXECUTE THE FIRE EMERGENCY PROCEDURE. JUST PRIOR TO PUSHING THE FIRE BUTTON, THE LIGHTS ALL WENT OUT AND THE AUDIO STOPPED. REQUESTED PRIORITY HANDLING FROM THE TOWER, AND PROCEEDED WITH THE APPROACH. DURING THE APPROACH, THE FIRE LIGHT AND AUDIO CAME ON AND WENT OFF SEVERAL MORE TIMES, EACH TIME GOING OFF JUST PRIOR TO US EXECUTING THE EMERGENCY PROCEDURE. HAD TOWER GIVE A VISUAL CONFIRMATION THAT THERE WAS NO SMOKE OR FIRE. DID NOT FIRE THE BOTTLE, AND PRIOR TO LANDING, BROUGHT NR 2 ENGINE BACK ONLINE FOR A NORMAL LANDING.