As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RAMP PERSONNEL NOTICED EXTERIOR EMERG LIGHTS ON INITIALLY AND THEN WENT OUT. FOUND BOTH ENTRY DOORS AND SERVICE DOORS SLIDE LIGHTS INOPERATIVE. USAIR BATTERY PACK TRIED AND LIGHTS WORKED INITIALLY AND THEN TURNED OFF AND CAME BACK ON. REPLACED SLIDE BATTERY PACK AND POWER SUPPLY.