As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MESSAGE 'POWER XFER UNIT' IS DISPLAYED. STATUS MSG CAME ON AT CRUISE. OPERATED PTU MANUALLY, COMPLETED VISUAL INSPECTION OF PTU CONTROL AND INDICATION WIRING IN LH & RH WW, COMPLETED TEST PROCEDURE FOR THIS MESSAGE WITH BOTH ENGINES AS PER PROCEDURE - AND NO PROBLEMS NOTED IN ANY OF THESE TESTS.