As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPEAT WRITE UP. EMER LIGHTS ILLUMINATE INTERMITTENTLY WHEN CONTROL SWITCH IS MOVED FROM OFF TO ARM. ALSO ILLUMINATE WHEN SWITCH IS IN THE ARM POSITION DURING ENGINE START. CORRECTIVE ACTION: REPLACED #1 BATTERY PACK. OPS CHECK GOOD. PHENOM 300 AMM 33-52-01