What was found
NR 1 MASTER FIRE WARNING ILLUMINATED FOLLOWED BY NR 1 ENGINE FIRE INDICATIONS. EMERGENCY ACTIONS ACCOMPLISHED, LIGHTS WENT OUT, FIRE TEST NORMAL. AFTER LANDING FIRE LIGHT NR 1 REILLUMINATED. CREW AGGRESSED AIRCRAFT, EXITED AIRCRAFT VIA ESCAPE SLIDE. TROUBLESHOT AND FOUND FIRE DETECTION ELEMENT BAD. REMOVED AND REPLACED FIRE DETECTION ELEMENT PER MM 26-11-12. TESTED FIRE DETECTION SYSTEM, SYSTEM GROUND TESTED GOOD PER M/M 26-11-01.