What was found
AIRCRAFT WAS NOT GROUNDED: DURING PS CHECK FOUND EMERGENCY POWER SUPPLY UNIT 15WL BATTERY NOT WORKING. REPLACED BATTERY FOR EMERGENCY POWER SUPPLY UNIT 15WL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: DURING PS CHECK FOUND EMERGENCY POWER SUPPLY UNIT 15WL BATTERY NOT WORKING. REPLACED BATTERY FOR EMERGENCY POWER SUPPLY UNIT 15WL.