As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 FIRE HANDLE INTERMITTENTLY GOES OFF AFTER TAKEOFF. FOUND SIX STAGE DUCT LEAKING AT FIREWALL ABOVE FIRELOOP REMOVED AND REPLACED DEFECTIVE DUCTING IAW B727 M/M 36-00-01. PERFORMED ENG RUN NO LEAKS NOTED IAW ASTAR JRHCHPT 7. REMOVED AND REPLACED FIRE LOOP DETECTION.