In this Phase II effort, Global Circuit Innovations (GCI) will continue to perform R&D to develop and deliver a form, fit, and function drop-in replacement for the obsolete Hybrid Digital RF Interface Multichip Module (MCM). This urgent need was brought to our attention by Michelle Moran, F-22 Senior Mechanical Engineer at BAE Electronic Systems, and is a component within the F-22 Raptor AN/ALR-94 (Radar Warning Receiver) Electronic Warfare System (EW) system, which is supported at the Ogden Air Logistics Complex (OO-ALC) at Hill AFB, UT. During the Phase I effort, GCI was able to identify the USAF Technical Point of Contacts (TPOCs) Vincent Eddards/NH-04/Chief, F-22 Avionics and Ted Stokes/NH-04/Chief, Sustainment, F-22. GCI has interacted with numerous stakeholders of the project including BAE Systems engineering, contracts, program management, as well as members of the F-22 sustainment team. The F-22 has a requirement for an End of Life (EOL) buy of 423 units of 3109610 Hybrid Digital RF Interface MCM. The Air Force fleet currently contains 186 F-22 aircraft. The F-22 does not have a defined retirement date, so sustainment is necessary for an indeterminate timeframe. GCI will continue to perform reverse engineering in the Phase II effort to provide a form, fit, and function, drop-in replacement that will work identically to the obsolete Hybrid Digital RF Interface MCM.