Not dumb at all. It's actually kind of sad that the top half of the list here at XJ are all too familiar with this abbreviation.

TOWOP = Time Off WithOut Pay

As of right now, it's nothing to get too worked up about. I would imagine they are trying to adjust for our slight over-staffing in the Saab and to give our maxed out training center a chance to catch up. My experience is never to get too comfortable in this industry, things like this are a reminder why.