As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KMIA - NR 4 ENGINE FIRE WARNING LIGHT FLICKERED A FEW TIMES, WITH POWER PULLED BACK TO 1.50 EPR ALL PARAMETERS NORMAL AND NO FLICKERING LIGHT. PERFORMED PRECAUTIONARY SHUT DOWN. REMOVED AND REPLACED LOWER FIRE WARNING LOOP ON NR 4 ENGINE. OPS CHECKS NORMAL IAW 26-2-0. (M)