Seat back broken - non-SER

[Jim Wright]

This AM on my wife's Maxima, the driver's side seat popped and the back
fell down.  I didn't have time to pull the seat out and look at it, so
I just jammed a cooler behind it (she insisted on driving it today),
and my FSM is of course in her trunk...

Anyone have an idea of what parts might be involved in fixing this?
The adjustment lever seems to be working (not stuck), so I'm not sure
if a spring/wire snapped in there or what.