As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN REF TO: DURING INSPECTION OF THE TASK CARD 900-57-900-300 IT WAS DETECTED CORROSION ON STATIC DISCHARGE BASE (4EAS) BTW AILERON AND WING EXTENSION TRAILING EDGE WS370.25 TO WS398.939 AFT OF THE REAR SPAR AT LH/RH WING. CORROSION ON STATIC DISCHARGE BASE (4EAS) BTW AILERON AND WING EXTENSION TRAILING EDGE WS370.25 TO WS398.939 AFT OF THE REAR SPAR AT LH/RH WING WERE REPLACED PER CRJ-900 AMM 57-00-28-960-801-A02