As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE LANDING GEAR INDICATION SYMBOLS AND 9 CAS MESSAGES ILLUMINATED AT THE SAME TIME. THE AIRCRAFT MADE AN UNEVENTFUL LANDING. MAINTENANCE REMOVED AND REPLACED THE PROXIMITY SYSTEM ELECTRONICS UNIT IAW CRJ700 AMM 32-61-01-400-801-A01. THE LANDING GEAR WAS OPERATIONALLY CHECKED IAW CRJ700 AMM 32-30-00-710-801-A01. ALL OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.