As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3604 THE CREW FOUND THE EMERGENCY LIGHTING DOES NOT HOLD A CHARGE. (THE SWITCH WAS FOUND IN THE ARMED POSITION). THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE EMERGENCY POWER SUPPLY UNIT BATTERY PACKS. THE OPERATIONAL CHECK WAS GOOD. SERIAL NUMBERS: 1) 70401 2) 60805 3) 74856 4) 77141. THE AIRCRAFT WAS RETURNED TO SERVICE.