As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) POST ACFT C-CHECK, APU RUN CONFIRMED HEAVY FUEL LEAK FORM FLANGE, REAR GG CAST TO CONTAINMENT RING. THE OPERATOR DECIDED TO REPLACE THE APU. MFG WILL INVESTIGATE TO ESTABLISH ROOT CAUSE & PROVIDE INFORMATION THROUGH SUBSEQUENT SERVICE DIFFICULTY REVIEW MEETING & SUPPORTING DOCUMENTS OR OTHER AGREED UPON COMMUNICATIONS.