As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
* RIGHT WING # 4 FLAP HINGE ARM HAS CORRODED H/W COMMON TO AFT FLAP MOUNT (C-CHECK RO 8/18/2021) REMOVED HARDWARE (PIN) FROM RH WING #4 FLAP HINGE ARM. REF CRJ 700 AMM 57-53-27-000-802-A01 STEP 4A (12) AND (13). / INSTALLED NEW HARDWARE (PIN) TO RH WING #4 FLAP HINGE ARM. REF CRJ 700 AMM 57-53-27-400-802-A01 STEP 4A (2) AND (3).