What was found
AIRCRAFT WAS NOT GROUNDED: DURING PS CHECK EMERGENCY LIGHTS TEST "BATTERY/EMERGENCY POWER SUPPLY UNIT (13WL) AFT LEFT CLASS 1" FAULT CAME UP. REPLACED BATTERY AT AFT LEFT PER AMM 33-51-38.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: DURING PS CHECK EMERGENCY LIGHTS TEST "BATTERY/EMERGENCY POWER SUPPLY UNIT (13WL) AFT LEFT CLASS 1" FAULT CAME UP. REPLACED BATTERY AT AFT LEFT PER AMM 33-51-38.