As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOG PAGE 17748 - UPON ROUTINE PRE-FLIGHT EMERGENCY LIGHTING SYSTEM INSPECTION FOUND LEFT OVERWING ASSEMBLY NOT TO ILLUMINATE UPON SYSTEM ACTIVATION. FOUND LEFT EMERGENCY BATTERY PACK TO BE AT FAULT FOR THE OVERWING POSITION, REPLACED BATTERY PACK AS REQUIRED. OPERATIONAL CHECK NORMAL 33-50-0. (X)