[oldE]

Watching a four engine aircraft go over this afternoon, I noticed something odd in the contrails. The right side outboard engine and the two inboard engines seemed to be parallel. The left outboard engine was directing its exhaust a few degrees outboard. The contrail from that engine diverged from the other three for a while but converged again after a few seconds.
Was I observing a misalignment of the left side outboard engine?
It seems to me having an outboard engine directing its thrust at an angle to the center line would mess with the trim.

Best
Les