What was found
BTV---CO4361, CREW REPORTED, ON TAKEOFF AT 300 FT, NR 1 ENGINE FIRE WARNING ON EICAS CAME ON, DISAPPEARED AT 30 SECONDS LATER BEFORE ENGINE POWER WAS REDUCED AND SHUTDOWN. NORMAL LANDING WAS MADE. MAINTENANCE REMOVED AND REPLACED NR 1 ENGINE IAW TASK CARD. OPS. CHECKED GOOD. AIRCRAFT RELEASED FOR SERVICE.