What was found
#1 PROP WILL NOT UNFEATHER FOR MAINTENANCE USING THE ALT FEATHER PUMP. REPLACED THE #1 ENGINE PCU IAW AMM 61-20-11-000-801 AND 61-20-11-400-801. CHECKS GOOD 61-20-11-400-801.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
#1 PROP WILL NOT UNFEATHER FOR MAINTENANCE USING THE ALT FEATHER PUMP. REPLACED THE #1 ENGINE PCU IAW AMM 61-20-11-000-801 AND 61-20-11-400-801. CHECKS GOOD 61-20-11-400-801.