As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOTICED DURING DELIVERY INSPECTION (BEFORE RELEASE FOR FLIGHT AFTER MAINTENANCE) THAT THE APU FIRE BOTTLE WAS EMPTY. NO INDICATION IN THE COCKPIT THAT THE BOTTLE WAS EMPTY. FIRE BOTTLE SQUIB WAS NOT DISCHARGED. REPLACED BOTTLE AND SQUIB. AIRCRAFT RELEASE FOR FLIGHT.