As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCOVERED EMERGENCY LIGHT BATTERY FAULT CAS MESSAGE AFTER POWER UP. TROUBLESHOT SYSTEM. REMOVED AND REPLACED NR 1 AND NR 2 EMERGENCY LIGHT BATTERIES. OPS CHECK GOOD. ALL WORK IAW AMM 33-51-01. NR 1 P/N OFF/ON: 6450LS-00 S/N OFF: 001627 S/N ON: 001875 NR 2 P/N OFF/ON: 6450LS-00 S/N OFF: 001592 S/N ON: 001358.