Continuing delays over Japanese Maritime Self-Defence Force (JMSDF) plans to replace its Lockheed Martin P-3 Orions have led BAE Systems to consider re-opening its Nimrod maritime patrol aircraft (MPA) assembly line if it mounts a successful bid for the programme. As a result, the UK's Defence Export Services Agency (DESO) sponsored the appearance of a Royal Air Force Nimrod at the show.

Japan has for years been planning to replace around 100 Kawasaki-built P-3s with an indigenous MPA, although the Japan Defence Agency revealed last year that it was also reviewing off-the-shelf aircraft. Initial plans called for deliveries to start in 2008.

BAE is updating 21 Nimrod MR2s to MRA4 standard with new wings, tail and engines as well as a Boeing-developed mission system. Despite delays to the refurbishment programme, the development work has reached a stage where it can be demonstrated to potential customers.

It is believed that BAE would need to build around 25 Nimrods to make re-opening the fuselage line - which closed nearly 30 years ago - affordable.

The JMSDF requires at least 50 aircraft. Japan originally specified a multi-purpose turbofan-powered aircraft, but has broadened its specification. It has also considered using the MPA airframe as a replacement for the Kawasaki C-1 jet transports operated by the Japanese Air Self-Defence Force.

Boeing is believed to be offering an MPA based on an airliner equipped with a system developed from its Nimrod MRA4 work.

Robert Young, Lockheed Martin president Asia Pacific, says the company continues to talk with the JMSDF and Kawasaki about updated P-3s.

Meanwhile, Lockheed Martin will begin talks with Taiwan after the show to discuss the nation's long-standing requirement for anti-submarine warfare aircraft. The Taiwanese navy operates 32 elderly Grumman S-2T Turbo-Trackers. The US company received permission to pass P-3 Orion data to Taiwan in December. But vice-president of business development Rick Hundley says that until discussions begin it will not be clear how many P-3s Taiwan can afford. Regardless of the cost, it is unlikely the Taiwanese will replace its S-2s on a one-for-one basis.

Taiwan has expressed an interest in used airframes with mission system upgrades, possibly on similar lines to the work Raytheon is carrying out on Australian and New Zealand P-3s. Airframe availability would be an issue for Taiwan, probably requiring the US Navy to retire P-3s.

Source: Flight International