No they can occur from startup. I have seen some on the start up before.
We don't put any 'broken engine flag' BEFORE you take off though (i.e. the mechanic left a spanner in there) - it only checks engines once the sim is running.

BTW some people hardly ever see failures, some see lots just the way random goes sometimes.


Regards,

Polovski,
OBD Software, developers of immersive flight sims;
Wings Over Flanders Fields and Wings Over The Reich
http://www.overflandersfields.com
http://www.wingsoverthereich.com