Board Thread:Game Discussion/@comment-26430515-20150907082604/@comment-26715739-20150907125757

Some people have been saying that they've been able to get it to repair while offline since the latest update so it might not work anymore.

I think the key was that the "bonus time" only starts from the point where you get the message that you're offline. So it's not good enough just to go offline, you also have to get the message telling you that the game tried to synch and wasn't able to.