As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLIGHT DATA RECORDER FAIL LIGHT CAME ON. MAINTENANCE FOUND ONE CORNER OF THE AIR CYCLE MACHINE FLANGING HAD CUT THROUGH THE CHAFING PROTECTION AROUND THE WIRE HARNESS AND HAD PENETRATED THE INSULATIONOF ONE WIRE. THE WIRE WAS R12A22 (THE ANNUNCIATOR CIRCUIT).