As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION DETECTED DURING DETAILED INSP OF L/H OTBD FLAP HINGE BOXES, ON L/H OTBD FLAP (CENTER) HINGE BOX BUTE DOOR "SPRING" ACUTATOR , ON THE SPRING COILS (FLAGGED). (C-CHECK) RO 2/25/2021. REMOVED AND REPLACED L/H OTBD FLAP HINGE BOX SPRING WITH A NEW HINGE BOX SPRING REF CRJ200 AMM 27-54-25-000-801 AND CRJ200 AMM 27-54-25-400-801.