Guys,
As usual the time it takes to change a window depends on who changed it the last time. A correctly installed window will have underneath the aerodynamic seal a piece of string. You dig the end of the string out and pull it to break the rest of the seal. If this has not been done it will be a ****** to break the seal without damaging the surrounding structure, so will take a lot longer.
Time to change it also depends on the local weather. It will be easier and quicker if it is a nice 18 degs C and dry, than if it is 2/3 degs C and raining. We have changed a window here in about 4 hrs. However time should then be allowed for the new sealant to cure (the MM allows for the application of speed tape over the sealant to prevent it splurging all over the a/c) and the window will have to be retorqued several times over the following days.
Contrary to a previous post you CAN fly with a delaminated window (usually only within an inch or two of the edge as these are not considered to structurally degrade the window) The a/c MM will clearly define the various limits, and to my surprise according to our MEL are able to fly with one cracked!!??
'FWD (#1) window outer glass ply may be cracked provided :-
Visibility is acceptable to the captain and the remaining window has clear visibility.
Airspeed is limited to 280kts below 10000ft
The a/c may continue the flight or series of flights not to exceed 1 flt day prior to repairs
(obviously a get you home MEL item)
Hope that helps.
Cheers