As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT READIED AND RT ENGINE START PARAMETERS NORMAL. RT CONDITION LEVER ADVANCED TO MIN. RT PROP DOES NOT UNFEATHER. RT CONDITION LEVER RETARDED TO FEATHER. RT CONDITION LEVER ADVANCED TO MIN. RT PROP DOES NOT UNFEATHER. MAINTENANCE CALLED TO SIGHT FOR INVESTIGATION AND TROUBLESHOOTING. PASSENGERS CHARTERED. AIRCRAFT GROUNDED FOR 3 DAYS. RT HYDRAULIC UNIT D-5990-1 SN S296 UNSERVICEABLE. SN S296 TSN 4293.1. RT HYDRAULIC UNIT D-5990-1 REPLACED WITH OVERHAULED UNIT SN S53. HYDRAULIC UNIT SN S53 TSN 12735.5. (TC NR 20060831006)