What was found
KMIA - FLT 68305 - MASTER FIRE WARNING SHUT DOWN. IN MIA TERMINAL AREA, NR 4 ENGINE MASTER FIRE WARNING, SHUT DOWN NR 4 ENGINE. NORMAL LANDING. FOUND SEVERAL FIRE LOOP MOUNTING BRACKETS LOOSE AND GROMMETS MISSING. REPAIRED AND REPLACED MOUNTING BRACKETS. INSTALLED MISSING GROMMETS. RAN ENGINE AT TAKEOFF POWER FOR 5 MINUTES WITH BLEED AIR ON. NO FIRE WARNING. FIRE WARNING SYSTEM OPS NORMAL IAW MM 26-2-0. REFERENCE, OPERATOR CONTROL NR CKSA95140.