They had four FA's with flashlights and gloves on digging in the seat. The problem appeared to be the motor worked but something was "jamming" the track/belt that allows the seat to recline. I think something is sheared off and stuck in the track. The seat would not move at all. I would have been okay with a manually recline or ANY recline. But it was stuck firm. I suspect something sheared off the last time it went upright.