Airbus is drawing up contingency plans to phase out production of the world's largest jetliner, the A380 superjumbo, if it fails to win a key order from Dubai's Emirates, three people familiar with the matter said.

The moment of truth for the slow-selling airliner looms after just 10 years in service and leaves one of Europe's most visible international symbols hanging by a thread, despite a major airline investment in new cabins unveiled this month.

"If there is no Emirates deal, Airbus will start the process of ending A380 production," a person briefed on the plans said. A supplier added such a move was logical due to weak demand.