As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE WAS STARTED, YET WHEN POWER LEVERS WERE MOVED FORWARD TO TAXI THE LT ENGINE WAS UNRESPONSIVE. ACFT WAS RETURNED TO MAINTENANCE AND AFTER TROUBLESHOOTING WAS CARRIED OUT THE DRIVE BETWEEN THE FUEL PUMP AND FCU WAS FOUND TWISTED AND THE VESPAL SPLINE HAD BEEN BROKEN INTO SEVERAL PIECES.