Interesting initial findings, of note: The Captain was recently released after type conversion and most of his experience was on T/Ps. Only 188 hrs Jet. The 10 Bank Angle warnings indicating manual flight. Changing ATC instructions possibly confused the crew, it may be they selected 270 on the MCP, which could have given the RIGHT turn from HDG 315, when ATC wanted a Left turn, hence the AP disconnection and manual flight. Stalling after overbanking to the LEFT seems the most probable cause. The Trim tab is off for investigation as per AD, unlikely to be a big factor.