As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DCA/RDU - FLT 802 - APU FIRE WARNING ON DESCENT INTO RDU. AGENT LOW LIGHT ILLUMINATED. MANUALLY DISCHARGED AGENT TO ENSURE PROCEDURE COMPLETED. INSPECTION REVEALED NO FIRE HAD OCCURRED. REPOSTIONED APU FIRE LOOP AND REPLACED FIRE EXTINGUISHER BOTTLE. (X)