I filed concurrent I-140(OR)/485 on 9/2002 at TSC. Now I have an opportunity to transfer to a different job function within the company. The new position will require most expertise that the I-140 was based on, however, the function will be somewhat different. Current job is materials analysis; and new job will be materials development. Will AC21 apply in this case? Any possible problems? Anybody has had similar situation? Many thanks for your replies!