What was found
AIRCRAFT WAS GROUNDED: CLIMBING THROUGH AROUND FL230, WE RECEIVED 2 OVERHEAT DETECTION ALERTS FOLLOWED BY A FIRE BELL AND ENGINE 2 OVERHEAT. NO FIRE HANDLES ILLUMINATED. THE BELL LASTED UNDER 1 SECOND AND SELF EXTINGUISHED AND A FAULT LIGHT FOLLOWED. ENGINE 2 PARAMETERS NORMAL. INSPECTED NUMBER 2 ENGINE INLET, EXHAUST AND EXTERIOR. NO SIGNS OF FIRE DAMAGE NOTED. FOUND ENGINE 2 LOOP-B FIRE DETECTION FAULTING. PERFORMED ENGINE FIRE DETECTION BITE CHECK, PER FIM 26-10-00-810-801. FOUND ENGINE 2 LOOP-B FAULT. REPLACED M1759 DETECTOR (AALA202509121383), PER AMM 26-11-01. ALSO, REPLACED MW0326 HARNESS (AALA202509165144), PER AMM 26-11-02. OPERATIONAL CHECK GOOD