As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR/GROUND MESSAGE ILLUMINATED ON TAKEOFF, GEAR HANDLE WOULD NOT COME UP, MESSAGE WENT WENT AWAY ON LANDING. FOUND PIN "A" BROKEN ON PROXIMITY SWITCH. REMOVED AND REPLACED NOSE LANDING GEAR PROXIMITY SWITCH IAW EMB AMM 32-63-05. PERFORMED EXTENSION AND RETRACTION CHECKS WITH NO DEFECTS. RETURNED AIRCRAFT TO SERVICE.