Originally Posted by
redsnail
If it's a technical issue, it's either a quick fix or it'll take hours/days. The thing is, you don't know until the engineers open up panels etc.
De icing can also create delays down the line. You just don't know when the aircraft will leave, hence the top tip of using FR24 is a good one.
I recall that there used to be three reasons for delays:-
Operational reasons
Technical reasons
Air traffic control reasons