A D328 CREW; APCHING ORD; EXPERIENCED AN ENG FIRE WARNING. ENG WAS SHUT DOWN.

Narrative

WHEN WE CHKED ON WITH ORD APCH; THEY OFFERED US TO DEVIATE FOR WX AS WE DESIRED; AND RPTED MODERATE TO SEVERE TURB WAS RPTED 5 MI AHEAD. WE DEVIATED L OF COURSE (NW) AROUND A CELL ON RADAR WHEN WE GOT THE R-HAND ENG FIRE WARNING. THE 25 MIN FLT FROM SPI HAD ALMOST CONTINUOUS LIGHT TURB WITH OCCASIONAL MODERATE TURB. WE WERE IN LIGHT TURB AT THE TIME. I INITIATED THE ENG FIRE MEMORY ITEMS AND THE FO AND I COMPLETED THEM TO THE POINT OF GOING TO THE CHKLIST; THE FIRE WARNING REMAINED AFTER DISCHARGING 1 FIRE BOTTLE. THE CHKLIST COMMANDS THE SECOND BOTTLE. THE CHKLIST IS KEPT IN OUR PERSONAL MANUALS; NOT IN AN ACFT BOOK AS IS PROBABLY NORMAL. DURING THE TIME IT TOOK THE FO TO GET OUT HIS CHKLIST (30 SECONDS); THE WARNING WENT OUT. ALSO DURING THIS 'DEAD TIME' I INFORMED ATC DECLARING THE EMER; IN CASE WE NEEDED TO QUICKLY COME IN TO LAND. WE RAN THE CHKLIST AND TALKED TO COMPANY DISPATCH; THEN ATC INFORMED US OF SEVERE TURB AND WINDSHEAR RPTS AT ORD. RFD WAS THE NEAREST ARPT; BUT WITH THE ENRTE WX AS IT WAS; TURB AND HVY RAIN; I WAS HESITANT TO GO THERE -- ESPECIALLY KNOWING THAT THERE IS NO AIRLINE SVC AT RFD; AND I WOULD HAVE TO BABY-SIT PAX FOR WHO KNOWS HOW LONG. DISPATCH READ US THE SEQUENCE RPTS FOR SEVERAL ARPTS AND I DECIDED MSN WAS MY MOST COMFORTABLE OPTION. I'VE BEEN THERE MANY TIMES; AND IT WAS GOOD VFR. THIS MAY NOT HAVE BEEN THE BEST 'BY THE BOOK' FAR CORRECT ALTERNATE; BUT I WAS MOST COMFORTABLE LNDG SINGLE ENG THERE; RATHER THAN FLYING INTO WX THAT DOESN'T PAINT WELL ON RADAR AND MAY BE DETERIORATING. I BRIEFED THE FO ENRTE THAT I WAS SUSPICIOUS THAT THE FIRE WARNING WAS ERRONEOUS AND WE COULD RESTART THE R-HAND ENG IF THERE WAS TROUBLE WITH THE L. WE TALKED TO MAINT CTL AND CONSULTED THE FLT ATTENDANT. SHE DIDN'T SEE OR HEAR ANYTHING OUT OF THE ORDINARY; AND GAVE A SHORT BRIEFING TO THE PAX (FO). TOTAL TIME ON A SINGLE ENG WAS 20-25 MINS. LNDG AT MSN UNEVENTFUL.