What was found
GEG - DURING TAXI NR 2 ENGINE FIRE WARNING SYSTEM ACTIVATED. STOPPED THE AIRCRAFT, PERFORMED FIRE ON THE GROUND PROCEDURE. FIRE INDICATION CEASED AFTER ACTIVATING THE FORWARD EXTINGUISHER BOTTLE. MAINTENANCE INSPECTED AND FOUND THE TAILPIPE CLAMP ON THE ENGINE EXHAUST MISALIGNED. THE NR 2 NACELLE AND ENGINE WAS INSPECTED AND REPAIRED IAW DHC-8 MAINTENANCE MANUAL, DHC-8 STRUCTURAL REPAIR MANUAL, EA'S 2-54-120, -123, -124, -127, -128, -129, -130, AND 2-54-133. OPERATIONAL CHECKS WERE PERFORMED AND CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.