Bravo - I also believe there is a legal requirement to remove the duals. Don't recall it being in the RFM, more likely to be in FCL 2.
At the last school I worked at the policy was that unless the person occupying the P2 seat was rated on type, currently licensed and current on type then the duals came out. That said with somebody less experienced acting as P1 I'd want the duals left in.
Glad everybody is ok. A few possible explanations (none that I'll air pre investigation) but feel certain some learning points will come from the AAIB report.
