As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR1 PROP WILL NOT UNFEATHER WITH BLEED AIR ON, UNFEATHERS WHEN BLEED SELECTED OFF. REPLACED NR1 OVERSPEED GOVERNOR IAW MM TASK 61-20-26-000-801/400-801. OPS AND LEAK CHECKS GOOD. UNFEATHER TIME SAME BLEEDS ON OR OFF. RETURNED TO SERVICE.