As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENG FIRE WARNING WOULD INTERMITTENTLY COME ON IN FLT AND DURING TAXI IN. FIRE TEST SYSTEMS CHECKED AND TESTED GOOD. REMOVED AND REPLACED FIRE DETECTION CONTROL UNIT PER MM 26-11-01 AND OPS CHECK NORMAL. REMOVED AND REPLACED FIRE AND OVERHEAT DETECTOR, PRECAUTIONARY DUE TO HISTROY.