As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT THE APU DISCHARGE SWITCH LIGHT WAS ON IN FLIGHT. NO RELATED ECAM MESSAGES WERE NOTED. MAINTENANCE PERFORMED OPERATIONAL TEST OF THE APU FIRE EXTINGUISHING LOOP/SQUIB PER AMM 26-22-00 AND NO ISSUES WERE NOTED. MAINTENANCE REPORTED THAT THERE WAS NO DISCHARGE LIGHT ILLUMINATED PRIOR OR AFTER OPERATIONAL TEST.