 For example, it was not clear based on existing instructions and guidelines whether a missed approach would be indicated and/or possible under these circumstances, and if so, what would be the recommended procedure to successfully execute the maneuver.Also, the condition of a shut down but unfeathered engine, i.e.windmilling propeller with high asymmetric drag and minimum control implications, which was encountered in this accident, was insufficiently covered, according to the NTSB.