Originally Posted by
The Juice
My bet on the Saab is they shut the left side down and no bus tie..so no hydraulics to taxi. The only other thing I can think of is the nosewheel did a 180 which I have seen before, looks freaky like that UFC fighter who broke his leg.
I've dumped most of my Saab system knowledge, but if I remember correctly, if there was no bus tie, there still would be hydraulics via the OVRD switch position on the hydrauic pump. It operates off the battery bus, not the left gen bus as it does in auto mode. However, a complete failure of the hydraulic pump itself of course would be good reason to stop.
Of course there are many other reasons to stop as well. Whatever the case, better safe than sorry.