Originally Posted by
docbert
If you have this problem at SFO, it's normally because the plane was undergoing maintenance overnight, and that maintenance ran late.
Or at least, that's what it's been every time I've had it happen.
Had it happen at SFO in December - the plane was there but parked on the wrong side of the runways. Since they were running at reduced capacity due to weather, they apparently weren't giving UA a break in traffic to tow it across the runways to the gate. We ended up getting a different aircraft that was an inbound that they redirected to our gate to unload. It ended up being a few hours of delay and running back and forth between a few gates. Being LAX based, normally avoid flying through SFO, but I needed a few UA miles late in the year so I flew UA through SFO instead of taking a nonstop on AS.