As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTING: ONE HOUR INTO FLIGHT, OBSERVED ALL CABIN EMERGENCY LIGHTS FLASHING ON AND OFF WITH THE SWITCH IN THE ARMED POSITION. REMOVED AND REPLACED #1 AND #2 EMERGENCY LIGHTING BATTERIES PERFORMED OPS CHECK AND CHARGING OF THE EMERGENCY LIGHTING OPS CHECK GOOD AT THIS TIME REF AMM 33-52-01.