As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MOMENTARY INTERMITTENT FAILURE IN DESCENT. 'DPU FAILURE' MESSAGE WOULD BE SHOWN. AND IAT WOULD SHUTDOWN, THEN COME BACK ON LINE. NOTE: THIS IS THIRD TIME UNIT. HAS BEEN REMOVED AND SENT TO MANUFACTURER. MANUFACTURER HAS BEEN UNABLE TO DUPLICATE THE PROBLEM BUT NOW HAS SUPPLIED US WITH A REPLACEMENT UNIT.