As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TAKE-OFF AUTOFEATHER DID NOT ARM AND TAKE OFF WAS ABORTED. FAULT CODE 274 OBSERVED IN CDS FOR THE LT ENGINE PROPELLER ELECTRONIC CONTROL UNIT (PECU). FOR TROUBLESHOOTING PURPOSES THE PECU'S WERE CROSS CHANGED. THE FAULT MOVED TO THE OTHER SIDE. NEW PECU INSTALLED ACCORDING AMM 61-20-32. TEST RUN PERFORMED W/O REMARKS.