MD80 CREW HAD A FIRE WARNING ON #2 ENG. THE FIRE WARNING WENT OUT. COMPANY MAINT AND ACR DISPATCH MGR ADVISED THE CREW TO CONTINUE THE FLT.

Narrative

ON TKOF FROM SEA; THE FUEL HEAT WAS INADVERTENTLY ACTIVATED ON THE R ENG. APPROX 20 SECONDS LATER; THE R ENG FIRE LIGHT CAME ON FOR APPROX 20 SECONDS. WE GOT A VECTOR DOWNWIND AND RAN THE ENG FIRE CHKLIST; BUT THE LIGHT WENT OUT BEFORE WE COULD START THE CHKLIST. THE FUEL HEAT LIGHT THEN WENT OUT (1 MIN TIMER) AND EVERYTHING WAS BACK TO NORMAL. THE R ENG PWR WENT TO 2.05 EPR MOMENTARILY; THEN BACK TO NORMAL CLB PWR. WE CONTACTED MAINT CTL IN SEA AND THEY ASKED ABOUT THE ENG INDICATIONS WHICH WERE NORMAL. THEY DISCUSSED IT AND WE THEN TALKED TO DISPATCH AND DIRECTOR OF FLT CTL AND THEY SAID IF EVERYTHING IS NORMAL; THEY WOULD LIKE US TO CONTINUE TO FAI. WE THEN DISCUSSED WITH DISPATCH ABOUT OUR FUEL TO OUR DEST/ALTERNATE. THEY ADVISED THEY COULD CHANGE OUR ALTERNATE IF NEED BE. UPON LEVELOFF; WE HAD AN EPR SPLIT ON THE ENGS (1.6 L; 1.8 R). WE CONTACTED MAINT CTL AND THEY HAD US SHUT OFF THE AUTOTHROTTLES. WE PROCEEDED TO FAI. UPON DSCNT WE HAD TO ACTIVATE THE FUEL HEAT DUE TO THE FUEL TEMP. UPON ACTIVATION OF THE FUEL HEAT; WE NOTICED ONLY A SLIGHT TEMP RISE ON THE R SIDE (NORMAL RISE/L SIDE IS ABOUT 80 DEGS C). WE DID NOT GET ANY FIRE LIGHT INDICATION DURING THE FUEL HEAT APPLICATION THIS TIME. WE CONCLUDED THAT THE 13TH STAGE PNEUMATIC DUCTING TO THE FUEL HEAT PROBABLY RUPTURED. UPON INSPECTION BY MAINT PERSONNEL IN FAI; FOUND THE 13TH STAGE DUCTING RUPTURED. IT WAS BENT INTO THE FUEL CTL LINKAGE. THIS IS ALSO THE REASON THE THROTTLES WERE SPLIT. IN HINDSIGHT; WE SHOULD HAVE RETURNED TO SEA AFTER TKOF.