What was found
ON CLIMBOUT, NR 3 ENGINE FIRE LIGHT ILLUMINATED. FIRE DETECTOR SWITCH IN A-MODE AS PER MCO. ALL OTHER ENGINE INDICATIONS NORMAL. SHUTDOWN ENGINE AS PER POM, FIRED BOTH BOTTLES AS PER POM AND FIRE LIGHT REMAINED ON UNTIL LANDING. TESTED FIRE LIGHT AFTER IT WENT OUT AFTER LANDING AND IT RE-ILLUMINATED AND STAYED ILLUMINATED AFTER TEST. REPLACED NR 3 ENG FIRE WARNING LOOP, CKS GOOD NO FIRE IND.