What happens about a FCE ruling?

Had surgery for broke wrist in three places received metal plate and also had carpal tunnel release . I reached mmi and orthopedic sent me for FCE six months ago. Injury was a year ago. FCE determined light duty, 8 hr days 40 hrs week. Dr. agreed. I work as a production associate making gas tanks. I have lost of strength, grip so forth with arm and hand. Last week I received letter from WC stating appointment time with orthopedic and stating they wanted to see if he would release me back to full duty and my overtime hrs. I am worried that he will do this. I still have lots of pain, no strength and do not believe I will ever last at reg duty. What good is the FCE? My loss of use is 16 percent. Already being treated badly at work. State of Ga.