Hamilton Standard 14SF23 Propeller feathering/reversing—autofeather system suspect faulty. SDR 510019821
Autofeather system suspect faulty. Autofeather control box reracked and system checked serviceable.
Hartzell HCB3TN5 Propeller assembly—propeller unserviceable. SDR 51001958
Propeller failed to feather correctly causing engine to windmill when propeller feathered. Investigation found blade angles incorrect.