As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3998 MIDDLETOWN, PILOT REPORTED THAT THE NR 2 PROP DID NOT FEATHER DURING THE AUTOFEATHER TEST. MAINTENANCE REMOVED AND REPLACED THE NR 2 PROPELLER CONTROL UNIT. ALL OPERATIONAL AND LEAK CHECKS WERE GOOD AND AIRCRAFT RETURNED TO SERVICE.