London - The order of 20 Airbus A380 by Emirates Airlines, which is valued at 9 billion dollars at list prices, is in danger of being canceled due to disagreement with British engine manufacturer Rolls-Royce.

Airbus previously warned that the production of A380 would come to an end if large volume orders would not arrive immediately. Then Emirates, who operates the largest A380 fleet in the world, gave a hand to the troubled A380 program with an order of 20 new aircraft including an option for 16 more.

According to the insiders, however, Emirates and Rolls-Royce could not reach an agreement on the delivery of engines yet. The Dubai-based carrier is not satisfied with the price and performance of the offered product.

The deadline for engine choice has now passed, so a delay of delivery or even an order adjustment is possible.

The other manufacturer of A380 engines, Engine Alliance, would not be interested in the order at all according to the same sources. The joint venture of General Electric and Pratt & Whitney has not received any request for its GP7000 for years, which is one of the two engine choices together with Rolls-Royce's Trent 900. Therefore, the company wants to focus on production for other aircraft types.

Both parties did not want to comment on the issue when asked.