As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERG LIGHT ALL CABIN EMERGENCY LIGHT REMAIN ILLUMINATED WITH THE SWITCH IN THE ARM POSITION. LIGHTS ALSO FLICKER ON AND OFF WHILE IN THE ARM POSITION. CORRECTIVE ACTION: REPLACED FORWARD EMERGENCY BATTERY. OPS CHECK GOOD. PHENOM 300 AMM 33-52-01-400-801