To everyone it may concern.
Rudder reversal was brought into the thread by my initial reaction to the stated 70 degree bank angle. I admitted to be waay off course but wondered, tounge-in-cheek, if the airplane in question had the same rudder design as f.ex. the USAir 427.
It was concluded that USAir 427 and at least two more planes suffered fatal rudder jams, even rudder reversals as on USAir 427. Here is a link to the Summary from NTSB:
Accident Investigations - NTSB - National Transportation Safety Board
On the same page you can download the accident report. Click PDF.