2914F or 2914DF? All the 2914DF models do this. It's a design flaw. They just slapped a "dynaflat" CRT on a deflection stage not designed for it - surprise, it looks weird.
The 2914F exhibits it to some degree, too, but you can often fudge things into looking reasonable at a cost of making other things slightly out of whack. There's a "H.LIN" setting (horizontal linearity) in service mode that can be of some use. You can also play around with pinbalance, pincushion, etc. to fudge the rest of the screen and make the right side look better.
The true fix is to change the value of one of the S-correction caps, but I don't know that anybody ever figured out the "proper" value, and getting it wrong can roast other parts.