Ukraine filed an appeal on 27 August concerning the WTO panel report in the case brought by Ukraine in “Russia — Measures Affecting the Importation of Railway Equipment and Parts thereof” (DS499). The panel circulated its report on 30 July 2018.
Further information will be available within the next few days in document WT/DS499/6
Parties to a dispute can appeal a panel’s ruling. Appeals have to be based on points of law, such as legal interpretation — they cannot re-open factual findings made by the panel. Each appeal is heard by three members of a permanent seven-member Appellate Body comprising persons of recognized authority and unaffiliated with any government. The Appellate Body membership broadly represents the geographic range of WTO membership, with each member appointed for a fixed term. Generally, the Appellate Body has up to 3 months to conclude its report.
Source:wto.org