What was found
AIRCRAFT WAS NOT GROUNDED: ON CABIN WALK EMERGENCY LIGHTS TEST, DOOR 4L EMERGENCY EXIT SIGN INOPERATIVE. REPLACED POWER SUPPLY BATTERY PACK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: ON CABIN WALK EMERGENCY LIGHTS TEST, DOOR 4L EMERGENCY EXIT SIGN INOPERATIVE. REPLACED POWER SUPPLY BATTERY PACK.