As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX NR 2 PROPELLER TOOK LONGER THAN NORMAL TO COME OUT OF FEATHER. ALL COCKPIT INDICATIONS WERE NORMAL. AFTER ABOUT 40 SECONDS THE PROPELLER CAME OUT OF FEATHER. MX GROUND RAN THE ACFT AND PERFORMED NUMEROUS UNFEATHERS. COULD NOT DUPLICATE 40 SECOND TIME. TIME WAS ABOUT 15 SECONDS FOR BOTH PROPS. ACFT RETURNED TO SERVICE. NO PARTS REPLACED.