As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE FDR WAS SENT OUT TO OBTAIN THE RECORDING FOR AN UNRELATED SYS FAILURE. WHEN THE AVIONICS SHOP ATTEMPTED TO READ THE FDR THEY FOUND THE FDR WAS NOT WORKING FOR ABOUT THE LAST 10HRS OF FLIGHT. THE LAST SCHEDULED MAINTENANCE THERE WAS A CORRELATION CHECK PERFORMED. NO FAULTS WERE FOUND AT THAT TIME. THE FDR IS NOW BEING O/H.