AN ATR72 ON APCH FOR LNDG AT 300 FT DECLARED AN EMER DUE TO #2 ENG FIRE WARNING CAUSED BY A PNEUMATIC DUCT LEAK.

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WE DEPARTED ZZZ ARPT; ZZZ; FO; ENRTE TO XYZ ARPT; XYZ; US; AT XA50 WITH 4 CREW MEMBERS AND 2 COMPANY MAINT TECHNICIANS ABOARD. NO REVENUE PAX WERE PRESENT ABOARD THE ACFT DURING THIS FLT. VMC PREVAILED AT THE TIME OF DEP AND ARR. I WAS THE PNF. AT APPROX 300 FT AGL; WHILE ON THE ILS APCH TO RWY 10 AT XYZ ARPT; I RECEIVED AN ENG FIRE MASTER WARNING ON THE #2 ENG OF APPROX 10-15 SECONDS IN DURATION. THE MASTER WARNING BELL WAS SILENCED. THE FO; THE MAINT TECHNICIAN OBSERVING FROM THE JUMP SEAT; AND MYSELF ALL VISUALLY VERIFIED THE NATURE OF THE WARNING BY NOTING THE APPROPRIATE INDICATIONS IN THE #2 ENG FIRE HANDLE; CREW ALERTING PANEL; AND CONDITION LEVER. THE FO AND I THEN VERBALLY AGREED THAT WE WOULD CONTINUE TO A LNDG AND HANDLE THE EMER ON THE GND. I NOTIFIED XYZ TWR THAT WE WERE DECLARING AN EMER AND INFORMED THEM THAT WE WOULD BE STOPPING ON TXWY E TO SECURE THE ENG AND INITIATE AN EVAC IF NECESSARY. XYZ ACKNOWLEDGED MY XMISSION; ASKED FOR THE NUMBER OF SOULS AND FUEL ABOARD THE ACFT; AND INFORMED ME THAT CFR WOULD BE WAITING. ONCE ON THE GND; I CLRED THE RWY AT TXWY E AS PLANNED; BROUGHT THE ACFT TO A COMPLETE STOP; AND PROCEEDED THROUGH THE MEMORY ITEMS AND QRH. AFTER SECURING THE #2 ENG; I THEN ASKED THE #1 FLT ATTENDANT TO ATTEMPT TO VISUALLY CONFIRM IF SHE COULD SEE ANY INDICATION OF FIRE THROUGH ANY OF THE CABIN WINDOWS. SHE PROMPTLY RESPONDED THAT THERE WAS NONE. I THEN ASKED XYZ TWR TO ASK THE CFR PERSONNEL OUTSIDE THE ACFT TO VISUALLY CONFIRM THAT THERE WERE NO INDICATIONS OF A FIRE. TWR; A FEW SECONDS LATER; INFORMED ME THAT CFR HAD ADVISED THAT THEY COULD SEE NOTHING TO INDICATE A POSSIBLE FIRE. I THEN INFORMED XYZ TWR OF MY INTENTION TO CONTINUE TO THE RAMP AND ASKED TO HAVE CFR FOLLOW ME TO THE PARKING SPOT. UPON ARRIVING AT THE RAMP; ALL APPROPRIATE CHKLISTS AND A POSTFLT INSPECTION WAS PERFORMED. THE POSTFLT INSPECTION REVEALED NO VISIBLE INDICATIONS OF DAMAGE TO THE ACFT; POWERPLANT; OR PROP. SYS OPS CTL AND MAINT OPS CTL WERE THEN NOTIFIED AS TO THE STATUS OF THE ACFT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS FERRYING TO XYZ WITH THE TECHNICIANS WHO WORKED THE FALSE FIRE WARNING RPT IN ZZZ. THE RPTR SAID THIS ACFT HAD A MAINT HISTORY ON #2 ENG FIRE WARNING; AND THE POSITIVE FIX WAS THE CORRECTION OF AN ENG PNEUMATIC BLEED AIR DUCT LEAK. THE RPTR STATED IT WAS DEFINITELY NOT A FALSE WARNING.