As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE DOOR OPEN WARNING MESSAGE AFTER GEAR RETRACTION. FLIGHT 2997-FILED CLOSED. WHILE PERFORMING "GVI" AND PROXIMITY SENSOR CHECK, IN REF TO CRJ 700 AMM, THE NOSE LANDING GEAR DOORS, FOUND ATTACHMENT FROM GEAR DOOR DRIVE ARM ASSEMBLY TO "LOWER" LOCK LINK ASSEMBLY BROKEN. P/N 52207-3, REF 700 AIPC. MDC FLAGGED BOTH PX30 AND PX31 DOOR CLOSED SENSOR FAR/OUT OF RIG. PLEASE REFERANCE AML NR 536721 FOR CORRECTIVE ACTION..