As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MASTER WARNING CHECK FIRE DETECTED WITH APU BOTTLE LOW LIGHT. PERFORMED FIRE TEST OF APU, OPS TEST GOOD. APU FIRE PANEL BTL LOW NOT ILLUMINATED. OPS CHECK OF APU CHECKS GOOD NO DEFECTS NOTED. NO CURRENT FAULTS IN CDS. PERFORMED GVI OF APU AND APU FIRE BOTTLE NO DEFECTS NOTED. RETURNED TO SERVICE. NO PARTS REPLACED.