As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS NOT GROUNDED. EMERGENCY POWER SUPPLY ABOVE DOOR 4L IS INOP. REPLACED EMERGENCY POWER SUPPLY ABOVE DOOR 4L IAW AMM 33-51-06. PERFORMED OPERATIONAL TEST OF THE EMERGENCY LIGHT IAW AMM 33-51-00. THE LIGHTS ARE OK FOR SVC.