T he Celtech A/M37T-20C Jet Engine Stand is the preferred choice of the United States Air Force for testing all series of the F100, F101, F110, F119, F124, F125, F404, F414, J79, J85, TF30, TF33, TF34, TFE731 turbojet engines. Celtech has now installed the first T20 intermediate test cells for low cost testing of F404/414 engines. Celtech prides itself on producing a reliable, high quality product used worldwide to perform post maintenance and repair tests. Product modernization reviews are ongoing. A thorough review of the T-20C with application to USAF has advanced many new improvements, while preserving compatibility and configuration. Throttle refreshment has improved control and reliability. Combined with latest EDACS™ and ADAQ™ versions, automated runs can now be offered. All FADECs, DEECs, ECUs and legacy engine controls are properly interfaced. Technology refreshment for recurring maintenance needs, involving obsolescence and unavailability of older assemblies and components, also offers incremental modernization that is compatible with military form, fit, function and interface requirements. For indoor T-20 installations, the combined Celtech, Vital Link and Atec team is uniquely qualified to properly integrate hush house and test system solutions to US military configurations worldwide.