As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED NR 2 ENGINE FIRE WARNING COMING ON WITH POWER ABOVE 85 PERCENT. REDUCED POWER AND LIGHT WENT OUT. ADVANCED POWER AND BELL AND LIGHT CAME ON AGAIN. RETURNED TO EWR. *S/D* 13TH STAGE SADDLE DUCT SEAL (RT) LEAKING. REPLACED SEAL. TESTED SYSTEM, NO FIRE INDICATIONS.