As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMERGENCY LIGHTS AT LOCATIONS POWERED BY B5-123 BATTERY PACK ARE INOPERATIVE. MAINTENANCE REPLACED THE EMERGENCY BATTERY PACK PER B717 AMM 33-51, AT THE B5-123 LOCATION. THE EMERGENCY LIGHTS OPERATIONAL CHECK WAS GOOD. (LP #9217075)