As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CHECK FOUND UPPER DECK LIGHT DOOR BATTERY OK. LIGHT WON'T ILLUMINATE WHEN PRESSED/TESTED. TROUBLESHOOTING FOUND BATTERY CHARGER AT FAULT. REPLACED BATTERY CHARGER IAW AMDS 400-A-52-23-14-401-926A-A. SECURED & OPS TEST CHECKED OK. ACFT OK FOR SERVICE.