As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PREPPING ACFT FOR DEPARTURE, EMERGENCY LIGHT TEST FAIL. INDICATED EMERGENY LIGHT BATTERY 1 LOW. FOUND EMERGENCY LIGHT BATTERY POWER SUPPLY FAULTY. R & R EMERGENCY LIGHT BATTERY POWER SUPPLY IAW MM 33-51-01-4. EMERGENCY LIGHTS, OPS CHECKED GOOD.