As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT WHILE TAXING OUT FOR TAKEOFF, THE NR 2 ENGINE DID AN UN-COMMANDED FEATHERING. THE ACFT RETURNED TO THE BLOCKS AND WAS REMOVED FROM SERVICE. R & R THE RT ENGINE AUTOFEATHER UNIT IAW MM 72-01-10. PERFORMED OPS CHECK IAW JIC 61-22-00 AND FOUND WORKING PROPERLY. THE ACFT WAS RETURNED TO SERVICE.