What was found
ENGINE FIRE ON NR 1. PERFORMED EMERGENCY CHECKLIST. FIRE INDICATION STILL CONTINUED. PER CREW REPORT B-LOOP AT FAULT. INSPECTED ENGINE NO SIGNS OF FIRE EVIDENT. DEFERRED B-LOOP PER MEL 26-2-3 DMI NR 14565. FIRE BOTTLE NR 1 WAS DISCHARGED REF ITEM 1P LOG PAGE 360357. FIRE BOTTLE NR 2 WAS DISCHARGED REF ITEM 1P LOG PAGE 360357. REMOVED AND REPLACED NR 1 FIRE BOTTLE IAW SMM 26-20-01. OPS CHECKED GOOD. REMOVED AND REPLACED NR 2 FIRE BOTTLE IAW SMM 26-20-01. OPS CHECKED GOOD. REPLACE NR 1 ENGINE FIRE DETECTOR CONTROL UNIT PRECAUTIONARY. REMOVED AND REPLACED NR 1 ENGINE FIRE DETECTOR CONTROL UNIT IAW 26-10-2. OPS GOOD. DMI 14565 ENGINE FIRE ON NR 1 PERFORMED EMERGENCY (PER CREW LOOP-B).