We do not know when or how the float got deflated. Are not all float bags dual cell?
Just wondering. I don't have a 139 endorsement so am not posting with any knowledge of the float system attached thereto.
Kudos to the crew for their decision to ditch and successfully carry it out.
High temp followed by secondary indications ..Land immediately seems to be the go to procedure.
Second guessing from the comfort of the couch is a PPrune is SOP on this site. Given the inability to climb out of the aircraft in flight, open the cowlings and investigate..the crew had to react to the indications, and secondary indications they were faced with.
I don't think anyone is going to ditch unless they feel that is the best choice regardless of sea state.
The NF 92 accident taught us a lot of lessons.