I wonder what the checklist says? I've had a broken windshield in a pressurized aeroplane - the outer pane.
Descend to FL250 or less. Reset cabin press differential to 4psi or less.
Should the window be showing signs of imminent failure -deformation,increasing cabin altitude or inner pane damage, the drill was to make emergency descent, lower cabin diff pressure (0psi if possible) and O2 as needed.
Fortunately for them, the King Air is one sturdy aeroplane. Airframe limitations are above 3 Gs.