As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MX FOUND RIGHT MLG UPLOCK PROXIMITY SENSOR TARGET BRACKET LOOSE. MANUAL MANIPULATION OF THE TARGET WITH THE GEAR RETRACTED CAUSED GEAR TO GO FROM SAFE TO UNSAFE AND PRODUCE A GEAR DISAGREE WARNING. TIGHTENED, ADJUSTED, AND SAFETIED PROXIMITY SENSOR TARGET TO WITHIN LIMITATIONS OF CRJ AMM 32-61-05. SYSTEM OP CHECK GOOD DURING RETRACT CHECK.