What was found
(CAN) ACFT DISPATCHED WITH A BRAKE SYSTEM FAULT, WHITE BRAKE FAULT CAS MESSAGE, REF MEL/DDG 32-3. ON RETURN DURING DEFECT TROUBLESHOOTING, DAMAGE WAS OBSERVED ON BOTH OTBD MAIN WHEELS AND INBD MLG DOORS IAW ATTACHED REPORT. IT IS EVIDENT THAT THE MAIN WHEELS WERE STILL ROTATING DURING THEIR RETRACTION INTO THE UNDERCARRIAGE BAYS. THERE ARE NO "O" PROCEDURES RELATED TO THE POTENTIAL LOSS OF THE RETRACTION BRAKING FUNCTION DURING GEAR RETRACTION.