As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 PROP VERY SLOW TO UNFEATHER TOOK AT LEAST 40-50 SEC TO COME OUT OF FEATHER. REMOVED FROM SERVICE. PERFORMED FUNCTIONAL TEST OF PROP TIME TO UNFEATHER IAW Q400 AMM 61-20-00-720-802. FUNCTIONAL TEST NORMAL. PROP UNFEATHERED WITHIN 30 SECOND LIMIT. NO FAULTS NOTED IN CDS. NO FURTHER DEFECTS. RETURNED TO SERVICE. NO PARTS REPLACED.