As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H MIDDLE EXTERIOR EMERGENCY LIGHT WILL NOT ILLUMINATE. FOUND MULTIPLE ADDITIONAL LIGHTS OUT IN THE INTERIOR OF THE AIRCRAFT. SUSPECT #2 BATTERY ISSUES. TROUBLESHOT AND FOUND #2 BATTERY TERMINAL WITH POOR INTERNAL CONNECTION DUE TO FLUCTUATING OUTPUT VOLTAGE. REMOVED AND REPLACED BATTERY PACK. OPS CHECK GOOD ON ALL EMERGENCY LIGHTS WITHIN SYSTEM #2 AT THIS TIME.