<p>MIAMI (AP) -- Carnival Corp. is suing Rolls-Royce over a propulsion system for the Queen Mary 2 ship that the Miami-based cruise line claims is defective.</p><p>Carnival is seeking $100 million in damages in a lawsuit filed earlier this week in federal court. The suit contends that the British company deliberately deceived Carnival about problems with the Rolls-Royce Mermaid propulsion system. Carnival says the system has not worked properly since the Queen Mary 2 went into service in 2004.</p><p>Rolls-Royce officials did not immediately respond to an e-mail Wednesday seeking comment.</p><p>Rolls-Royce also has been sued over the Mermaid system by Royal Caribbean Cruise Lines and Regent Seven Seas Cruises.</p><p>&nbsp;</p>