As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED EMERGENCY LIGHTS BETWEEN 2R AND 1R INTERMITTENT ON AND OFF. TROUBLESHOOTING WITH COCKPIT EMR LIGHTS SWITCH AND FLT ATTENDANT TEST SWITCH WERE INEFFECTIVE. REPLACED 2 BATTERY PACKS AND 1 POWERSUPPLY BAD IAW AMM 33-51. (LP 8878054 - AIRCRAFT WAS GROUNDED)