Christian,
Not strictly true - you can slew while online, but only while "on ground" and expressly for the purposes of shifting from a used gate spot or pushback. Thanks to IVAP, it's becoming far less common (or necessary) to use slew for pushback...
I think I'm right in say that the new Flight Logger (possibly yet to be released) includes a detector for "not my fault" crashes like this and won't record it as a crash.
