Also convicted was former AgustaWestland CEO Bruno Spagnolini, who received four years.
Following Orsi's arrest in 2013 on suspicion of paying bribes to the former Indian air force chief to buy the AW101, India cancelled the contract and stopped Finmeccanica from pitching for new programs.
Under Italian law, defendants can appeal guilty verdicts, but prosecutors can also appeal against acquittals. At the appeal, Orsi's lawyers pushed to overturn the false bookkeeping sentence handed down at the first trial, while prosecutors argued for the reinstatement of the corruption charges.
Italian law also foresees a third law of justice — the court of cassation, or supreme court.
Speaking after the latest verdict, a spokesman for one of Orsi's lawyers said Orsi would appeal against his sentence at the court of cassation.