What was found
DFW - FL 3883 - NR 1 ENGINE FIRE WARNING DURING TAKEOFF ROLL, ABORTED TAKEOFF AND BLEW THE FIRE BOTTLE. CALLED OUT CFR, FIRE LIGHT EXTINGUISHED. FUNCTION CHECK FIRE INDICATION IAW SAAB 340 AMM 26-11-00. NO DEFECTS NOTED. GROUND RAN A/C, ENG TEMP 750, NO FIRE FAULT NOTED AND REPLACED NR 1 ENGINE FIRE BOTTLE IAW AMM 26-71-20. AIRCRAFT RETURNED FOR SERVICE. PART TOTAL CYCLES, 17,301. (X)