As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT AND RIGHT FLAP BPSU HAVE CORRODED MOUNTING HARDWARE. (C-CHECK RO 6/29/2021) REPLACED ALL MOUNTING HARDWARE AT LH AND RH FLAP BRAKE POSITION SENSOR UNIT PER CRJ 700 AMM 27-52-03-000-801-A01 AND AMM 27-52-03-400-801-A01 / TORQUE WRENCH WVACT204427 CAL DUE 31-DEC-21 / BPSU HARDWARE WAS R&R ONE AT A TIME. BPSU WAS NOT DISCONNECTED/NOT REMOVED.