Pratt & Whitney has ground-tested an upgraded version of the F100-229 fighter engine, the -229A, incorporating technology from US Department of Defense Integrated High Performance Turbine Engine Technology research. P&W say that performance expectations were exceeded in 110h of altitude testing. Temperatures and pressures are reduced at the present thrust rating of 130kN (29,000lb), extending hot-section inspection interval to 6,000h.
Source: Flight International