Somebody asked why, with both engines supplying full power, the aircraft couldn't still climb.
I believe the answer to this is because the drag was too great. With the pilot's "leg having given out", re the simulator trials, the aircraft's sideslip would have increased to the point where the yaw moment due rudder was equal to the opposite yaw moment due fuselage angle. As shown in the report, that was a significant angle, presenting much more of the airframe and nacelles to the airflow than is normally the case.
Also, with the sideslip angle at around 30 degrees, the prop thrust is acting at this angle, rather than directly along the flight path, so the reduction in thrust, also considering the off-optimum incidence angle into the props, could be anything up to 50% (my estimation).