As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A SCHEDULED HEAVY CHECK INSPECTION TASK RJ2-27-900-150 FOR FUNCTIONAL CHECK OF EACH AILERON POWER CONTROL UNIT, PCU, THE AME FOUND THE OUTPUT LINK ON THE RT SIDE OTBD AILERON PCU CRACKED. THE LINK WILL BE REPLACED BEFORE ACFT DEPARTS HEAVY.