As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT # 4 HINGE BOX, AFT FITTING ATTACHING NUT CORRODED (C-CHECK) RO 4/30/2020 REMOVED AND REPLACED L/H #4 HINGE BOX AFT ATTACH FITTING NUT IAW CRJ 200 AMM. NO FURTHER DEFECTS NOTED AT THIS TIME. TORQUE WRENCH INFO STS-4227 DUE 11 FEB 21