What was found
During Pre-flight in Clt for flight 5027, The overhead emergency lights would not test. Maintenance removed and replaced the battery pack. System ops checked good and Aircraft was returned to service.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
During Pre-flight in Clt for flight 5027, The overhead emergency lights would not test. Maintenance removed and replaced the battery pack. System ops checked good and Aircraft was returned to service.