pretty much anything can be repaired ---if diy take apart and diagnose problem and order replacement part--or send out to a repair shop in your area ust make sure repair doesnt exceed what mixer is worth
Unfortunately, it does not look like there is a replacement part available for your Farberware Toaster Oven model #510615. You may want to consider purchasing a new toaster oven.
Apparently AFO 44896 and not spelled aft 44896
Several for sale on eBay appeared to include a manual in the photograph, so , perhaps you could correspond with the seller on eBay to ask how to obtain a copy of the manual without purchasing the oven.
Example of one for sale: https://www.ebay.com/p/3030528628?iid=233313632041
Youtube appeared to have an instructional video:
https://www.youtube.com/watch?reload=9&v=xdCGhFXqCl0