What was found
EN ROUTE JAN TO SGF, NR 2 ENGINE FIRE WARNING ILLUMINATED. PEFORMED ENGINE FIRE SHUT-DOWN PROCEDURES ON NR 2 ENGINE. DISCHARGED NR 1 FIRE BOTTLE, AIRCRAFT LANDED AT SGF WITHOUT INCIDENT. INSPECTED NR 2 ENGINE FIRE LOOPS, NO DISCREPANCIES FOUND. FIRE WARNING SYSTEM OPERATING NORMAL. CLEANED NR 2 ENGINE FIRE LOOP CONNECTORS. INSTALLED REPLACEMENT NR 1 FIRE BOTTLE. AIRCRAFT RETURNED TO ISP. PERFORMED DETAILED INSPECTION OF AIRCRAFT FIRE WARNING SYSTEM. REPLACED MASTER WARNING CONTROL BOX, P/N 2618055-23, WITH SERVICEABLE UNITS. OPERATIONAL CHECK AIRCRAFT FIRE WARNING SYSTEM SATISFACTORY FOR RETURN TO SERVICE.