Did P2 have his hands on the power levers during the entire approach, or was there a transfer of power lever control at some point?
As I recall SOP was auto-throttle for all approaches, with PM's hand on the thrust levers to monitor their movement. The other option (rarely used) was for PF to call for power changes (as LP RPM settings), the adjustments made by PM manually. A strange system, and I can't remember the rationale behind it.