As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAL - AFTER TAKEOFF, EXPERIENCED FIRE WARNING ON NR 4 ENGINE. RETARDED THROTTLE AND FIRE WARNING CEASED. SHUT DOWN ENGINE, RETURNED TO SAL AND LANDED WITHOUT INCIDENT. INSPECTION REVEALED A DEFECTIVE FIRE WARNING AMPLIFIER. REPLACED AMPLIFIER AND SYSTEM CHECK NORMAL. RETURNED AIRCRAFT TO SERVICE. PART TOTAL CYCLES: 31,340. (X)