What was found
MIA - FLT 1453 - EN ROUTE MIA-AUS - DURNIG CRUISE AT 35,000 FEET, RECEIVED A RIGHT ENGINE FIRE WARNING. ENGINE PARAMETERS APPEARED NORMAL. ACCOMPLISHED EMERGENCY PROCEDURES. BOTH FIRE BOTTLES WERE DISCHARGED. LIGHT EXTINGUISHED BRIEFLY, THEN CAME BACK ON FOR REMAINDER OF FLIGHT. RETURNED AND LANDED MIA WITHOUT INCIDENT. REPLACED RIGHT ENGINE FIRE DETECTOR AMP AND ENGINE FIRE DETECTOR SUPPORT. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)