Small Aircraft; Low Wing; 2 Eng; Retractable Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 7
Situational Awareness; Distraction; Confusion; Human-Machine Interface
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Procedure; Human Factors; ATC Equipment / Nav Facility / Buildings
Aircraft X was handed off from AZO enroute southwest level at 8000. I pointed out the aircraft to SBN then at some point near the QTZ radar site the aircraft dropped off my radar scope and I didn't notice. The aircraft never retagged as it flew SW and into GUS airspace. The controller after me was asked about Aircraft X from GUS. After watching the replay; it appears as if some anomaly occurred as the aircraft passed over the 'cone of silence' at the QTZ site and was possibly too far from the GUS site as we were on multi-mode radar feed due to FWA radar outage.Possible automation issue when a site is out and aircraft passes directly over another radar site.
FWA TRACON Controller reported losing radar on an aircraft when it went over the radar site.