As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PARTIAL EMERGENCY EXIT LIGHTING ACTIVATION (ON THEN OFF) AT 8-10 MINUTE INTERVALS. OCCURS WITH THE SWITCH ARMED OR OFF. LIGHTS REMAIN ON FOR ABOUT 2 MINUTES EACH OCCURRENCE. R & R EMERGENCY LIGHTS POWER AFT SUPPLY BATTERY PACK IAW AMM 33-51-06.