As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV OVERHEAD LIGHT. LAV EMER LIGHT UNDER TOILET. LAV FLOOR LIGHT. AND REAR BULKHEAD EXIT SIGN ARE ALL INOP IN ARM MODE. IN ON MODE ALL EMER LIGHTS ARE INOP. TRIED TO CHARGE SYSTEM PER NOTE WITH LIGHT SWITCH IN OFF POSITION FOR 30 MINUTES WITH NO CHANGES. REMOVED FAULTY #4 EMERGENCY BATTERY P/N CBS28-1 S/N 5663M AND INSTALLED CUSTOMER SUPPLIED REPAIRED EMERGENCY BATTERY P/N CBS28-1 S/N 4152M. OPS CHECKS GOOD. WORK DONE !AW CE-680A AMM 33-50-06.