As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE CHECK OF THE EMERGENCY LIGHTING SYSTEM, IT WAS DISCOVERED THAT THE ASSOCIATED LIGHTS DID NOT STAY ILLUMINATED AS LONG AS THE ADJACENT LIGHTS. AIRCRAFT HAD BEEN SITTING WITH NO POWER AND MAIN SHIP BATTERY DISCONNECTED FOR 3.5 DAYS. AT THE TIME OF THE TEST THE EMERGENCY BATTERIES HAD BEEN CHARGING FOR LESS THAN 1 HOUR. FOR COMPANY COVENIENCE, THE AMT ELECTED TO REPLACE THE BATTERY OTHER THAN WAITING FOR THE BATTERY TO CHARGE DUE TO A FLIGHT SCHEDULED IN 3 HOURS.