The cracked screen isn't much of an event (had one on my Hilux last week) but replacing the screen with the correct length, correct diameter bolts is the important thing that might make this a real event with a subsequent departure of the screen (does a 737 screen push in or out ?) unless you want to join the same club as Tim Lancaster.
Maybe good for the pax that a spare 737 was sitting about with nothing to do ... but doesn't sound too good for JET2's bottom line.