As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FCU INPUT SHAFT BEARING DISINTEGRATED AND FCU INPUT SHAFT COUPLING SHEARED. ENG LOST CONTROLLABILITY DURING TAXI OUT FOR TAKEOFF. FCU SHOWED NO PREVIOUS INDICATION OF BEARING DISTRESS ON ANY OF THE BEARING WASH OUT INSPECTIONS. LAST PREVIOUS INSP WAS 85.3 HRS BEFORE FAILURE. BOTH THE FCU AND THE FUEL PUMP HAVE BEEN REPLACED WITH OVERHAULED UNITS.