What was found
THE EMERGENCY LIGHTS WOULD NOT TEST ON PREDEPARTURE CHECK. MAINTENANCE REMOVED AND REPLACED THE AFT BATTERY PACK AND CHARGER AND OPERATIONAL CHECKS WERE GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
THE EMERGENCY LIGHTS WOULD NOT TEST ON PREDEPARTURE CHECK. MAINTENANCE REMOVED AND REPLACED THE AFT BATTERY PACK AND CHARGER AND OPERATIONAL CHECKS WERE GOOD.