You may sometimes be dissatisfied with a statement given by the TE Office. In that case, you can request the TE Office to review the statement.
Even if you were dissatisfied with a statement of the TE Office, you cannot appeal it directly. First you need to apply for daily allowance. The decision on daily allowance is partially based on the statement of the TE office. When you appeal a decision on daily allowance, the Social Security Appeal Board will also investigate the statement given by the TE Office.