As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3707 -DE/MISC- AFTER LANDING CREW ADVISED BOTH ENGINES AND APU FIRE WARNINGS ILLUMINATED. AIRCRAFT WAS MET BY FIRE DEPARTMENT WITH NO SIGNS OF FIRE OR SMOKE. AIRCRAFT GATED UNDER ITS OWN POWER. CORRECTIVE ACTION: REPLACED ENGINE AND APU FIRE DETECTION UNIT AND FIRE CONTROL PANEL. OPS CHECKS GOOD.