What was found
FLT NR 0114 - IAH - THE NR 1 ENGINE LOOP 'A' AND FIRE DETECT LOOP LIGHT ILLUMINATED WHILE ON DESCENT INTO IAH AT 15,000 FEET. 'ABNORMAL' PROCEDURES WERE COMPLIED WITH AND BOTH FIRE BOTTLES WERE DISCHARGED. THE NR 1 ENGINE WAS SHUT DOWN. THE RED HANDLE LIGHT REMAINED ON FOR 10 MINUTES TO LANDING. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND NO EVIDENCE OF FIRE. THE NR 1 ENGINE 'A' FIRE DETECTION LOOP WAS REMOVED AND REPLACED AND OPERATION CHECKED GOOD. IN ADDITION, BOTH ENGINE FIRE BOTTLES WERE REPLACED. (M)