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. SHOWED UP AFTER ENGINE START. RT ENG STARTED 1ST. DID NOT SHOW "STATUS" ON LOWER EICAS. NUISANCE MESSAGE. FAILED PTU TEST. CHANGED PRESS SWITCH S10540, PTU CONTROL VALVE AND NR1 ENGINE SPEED CARD, NO HELP. CONTINUING TO TROUBLESHOOT. REPLACED K10338, K10399, AND CONNECTOR D6240. MESSAGE NO LONGER DISPLAYED. PTU NOW OPERATES NORMALLY.