As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED APU FIRE WARNING INDICATION INBD RDU AFTER APU START. CREW FOLLOWED QRH, APU FIRE BOTTLE DISCHARGED. FLT LANDED WITHOUT INCIDENT. NO EVIDENCE OF FIRE. CREW DID DECLARE EMERGENCY. R & R APU FIRE LOOPS IAW AMM 26-12-01. OPS CHECKED APU FIRE SYSTEM GOOD IAW AMM 26-12-00.