As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OPERATIONAL TEST OF THE RAM AIR TURBINE DURING ROUTINE MAINTENANCE CHECK, THE RAM AIR TURBINE (RAT) FAILED TO PRODUCE THE REQUIRED VOLTAGE. FAILURE OF THE RAM AIR TURBINE GENERATOR. THE RAM AIR TURBINE ASSEMBLY, WHICH INCLUDES THE GENERATOR, WAS REPLACED.