As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 679 FIRST FLIGHT OF DAY, AIRPLANE WAS DEPOWERED, EMERGENCY LIGHTS WERE ARMED, ONE SECTION OF EMERGENCY LIGHTS WERE ILLUMINATED. ONCE PWR WAS SUPPLIED TO AIRPLANE WE CHECKED EMER LIGHTS, THEY ILLUMINATED FOR NO MORE THAN 15 SEC THEN EXTINGUISH. CORRECTIVE ACTION: CHARGED THE POWER SUPPLY BATTERY PACKS. ALL EMERGENCY LIGHTS OPS CHECK GOOD. (LP 7753453)