Re-engined JSTARS completes tests - UPI.com MELBOURNE, Fla., May 23 (UPI) -- Northrop Grumman says its Military Airworthiness Certification is closer for its re-engined EC-8 Joint Surveillance Target Attack Radar System aircraft. A JSTARS test aircraft, fitted with a new propulsion system, successfully completed flight testing for certification, a major step in the JSTARS fleet being outfitted with the Pratt& Whitney JT-8D engine, new pylons and other equipment, the company said. "The men and women of Northrop Grumman and our Air Force teammates did an amazing job assuring the successful completion of JT-8D flight test program," said Bryan Lima, director, Joint STARS development and modernization programs for Northrop Grumman. The efficiencies and risk management of the test flight program directly impacted the reduction in certification flights needed and saved the government time and money. Northrop said use of the JT-8D engines give the aircraft improved takeoff performance and longer times at its on-station flight path and higher maximum altitude. JSTARS is an all-weather, long-range surveillance, battle management and command-and-control aircraft. It was first delivered to the Air Force in 1996.