Originally Posted by
717tech
A Qatar B777 went tech in PER last week. It was mentioned on social media that it was due to a cracked windscreen, and the replacement part arrived on the next days scheduled service. So, it needs to be understood that a spare pool of parts wont always save the day. An alternative would be to have a spare Aircraft at each port. That's not going to happen.
A windscreen change is hardly a common occurrence that you would keep a spare in a line station. For one thing, you probably need to put the aircraft into a hangar for 12 hours for the sealant to come up.