As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXTERIOR LIGHT AT AFT OF 2RMED INOP (767). RELAMPED (767) TWICE BUT NO HELP. REQUIRES ADDITIONAL TROUBLESHOOTING REPLACED BATTERY PACK, NO HELP. TRIED NEW BATT PACK & CHARGER AT POS M733 (STA 1406 BY SEATS 39JH), NO HELP. REPLACED CHARGER AT POS M733.