Technicians at Hill Air Force Base are repairing legacy F-16 components that are no longer commercially produced to sustain the Air Force fleet, according to a November 9 report. The 523rd Electronics Maintenance Squadron is working to return serviceable units to F-16 customers across the Air Force as parts for the aging fighter jet become obsolete.
One critical component being serviced is the F-16 Signal Acquisition Unit, or SAU. While the aircraft's black box retains tactical and mishap data, the SAU acts as a data harvester, collecting engine data, flight parameters, stress telemetry, and structural-load information.
Scott Brown, the 523rd EMXS Electronic Systems Flight chief, stated that because the SAU was originally manufactured decades ago, standard commercial suppliers no longer fabricate many of its required microcircuits and circuit card assemblies. This obsolescence requires a repair process that goes beyond routine replacement.
The depot-level maintenance process involves technicians cleaning, inspecting, and troubleshooting hardware down to the component level. Technicians use specialized test benches to simulate an F-16 cockpit environment while performing micro-soldering, radio frequency and digital testing, and software programming and verification.
In fiscal 2026, the SAU program achieved 100% on-time delivery, completing 82 shipments to F-16 units worldwide and meeting every scheduled delivery commitment.
To sustain the repair pipeline, the 523rd EMXS collaborates with the 309th Aerospace Maintenance and Regeneration Group, or AMARG, located at Davis-Monthan AFB, Arizona. AMARG is a geographically separated unit of the Ogden Air Logistics Complex that provides sustainment services and parts reclamation.
When an SAU cannot be repaired cost-effectively, technicians at AMARG remove legacy units from retired aircraft and send them to Hill AFB. These units serve as repairable units or as sources of components needed to restore other units to service. Dan Marcom, the 523rd EMXS Avionics Squadron director, said this teamwork across the Ogden ALC footprint provides the agility needed to keep the supply pipeline flowing.
