As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, NR 2 ENGINE FIRE WARNING LIGHT ILLUMINATED INTERMITTENTLY (APPROXIMATELY 5 SECONDS/MINUTES). AFTER DETERMINING NO FIRE, RETURNED TO BASE. MAINTENANCE REPLACED DEFECTIVE FLAME DETECTOR. REF: S-76 IPC, CHAPTER 26-11-00, FIGURE 1, ITEM 21.