As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
* L/H INBD INTERCOSTAL FWD OF THE AVIONICS BAY DOOR OPENING HAS CORROSION. (C-CHECK) RO 5/10/2020 REMOVED CORROSION FROM THE LH IB INTERCOSTAL FWD OF THE AVIONICS BAY DOOR OPENING, FOUND REMAINING MATERIAL TO BE OUT OF ALLOWABLE LIMITS. REMOVED AND INSTALLED NEW LH IB INTERCOSTAL FWD OF THE AVIONICS BAY DOOR REF CRJ 900 SRM AND DWG. PRESSURE LEAK CHECK GOOD. COMPLIED WITH. COMPLETED FORM M-337. SEE CONTINUATION CARD FOR DETAILS.