As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH SWITCH IN ARM POSITION CABIN AND EXTERIOR EMERGENCY LIGHTS ARE ILLUMINATED. DURING LAST FLIGHT PASSENGERS HIGHLIGHTED EMERGENCY LIGHTS FLASHED PERIODICALLY DURING THE PERIOD 25 MIN BEFORE LANDING UNTIL WE TURNED THEM OFF FOR ENGINE SHUTDOWN. REPLACED BATTERIES. OPS CHECK GOOD. IAW PHENOM 300 AMM 33-52-01.