As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 12,000 FEET, NOSE DOOR OPEN L CAS MESSAGE ILLUMINATED. AFTER COMPLETING CHECKLIST AND RETURNING TO LAND, BOTH CREW MEMBERS VERIFIED NOSE DOOR LATCHES WERE SECURE. SUPPLEMENTAL INFORMATION: REPLACED AND RIGGED LEFT NOSE DOOR LATCH SWITCHES SN001 AND SN005 IAW CE680 MM CHAPTER 52-20-01 AND 52-20-00. OPERATIONAL CHECK GOOD.