The tail jet exploded and took out all the hydraulics controlling rudder, flaps, etc. This was not supposed to be able to happen because there were redundant systems for the controls. So no procedure in the flight manual for that type of emergency. They controlled the plane with throttle to the two wing jets, as I recall they could only turn one way, so if they wanted to turn the other way they had to do an abbreviated circle.
Yes there was a DC10 trainer not part of the flight crew who came into the cockpit to help. He confirmed no procedures for total hydraulic/control failure.
Nevertheless, after the terrible misfortune with the engine they were fortunate to have the additional experienced hand in the cockpit, and Sioux City had run a major emergency/disaster drill with all hands on deck shortly before the day of the crash.
Haynes speech told the story of what happened that day, but the point was the importance of training and preparedness even when the unforeseen happens. Great stuff.