Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 176
Human-Machine Interface
Aircraft Equipment Problem Less Severe; Conflict Airborne Conflict
Flight Crew Overcame Equipment Problem
ATC Equipment / Nav Facility / Buildings; Aircraft; Environment - Non Weather Related; Human Factors
We were on descent and cleared for the ILS 35R into DEN by the TRACON and were hearing other aircraft ahead of us losing GPS signals and transponder issues. Shortly afterwards and approaching DORRY (IF) on the ILS 35R we received a 'LEVEL OFF' TCAS RA with no prior notification. The offending target was to our 2-3 o'clock and climbing. The First Officer was the Pilot Flying and complied with the RA using established SOP and I notified ATC. It appeared that the target passed beneath us. After clear of conflict we returned to our clearance for the approach and reestablished the automation. Shortly afterwards and while on final we had a temporary loss of GPS signal and transponder failure. We continued as we were established on the ILS. Both returned to normal on the ground. It seems other aircraft were having GPS/ADSB/Transponder issues that day into DEN; as well.
Air carrier Captain reported and airborne conflict requiring evasive action followed by a loss of GPS signal while inbound to DEN.