What was found
APPROXIMATELY 1 MINUTE AFTER SETTING TAKEOFF POWER NR 1 FIRE WARNING SOUNDED. WARNING EXTINGUISHED WHEN THROTTLE WAS RETARDED. SUSPECT BLEED AIR LEAK. SEE PREVIOUS WRITE UP. INSPECTED ENGINE FOR BLEED AIR LEAK AND DISCREPANCIES ASSOCIATED. FOUND NR 1 ENGINE ISOLATORS UPPER AND LOWER DAMAGED FROM LEAKING AIR. REMOVED AND REPLACED ISOLATORS PER MAINTENANCE MANUAL 71-21-1. REMOVED AND REPLACED NR 1 ENGINE TO FACILITATE OTHER MAINTENANCE PER WORK CARD 70T0001. FOUND ANTI-ICE DUCT BLOWN. REMOVED AND REPLACED DUCT, DETECTED NO LEAKS.