As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT AND RIGHT EMERGENCY SLIDE GROUND LIGHTS DO NOT ILLUMINATE.<[01] UPON FURTHER INVESTIGATION; FOUND EMERGENCY BATTERY PACK M1670 TO BE BAD; BATTERY PACK REPLACEMENT WILL BE DOCUMENTED ON TTG8Q00TK064;[02] VERIFIED CORRECTIVE ACTION #1