Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Executed Go Around / Missed Approach
Aircraft; Environment - Non Weather Related
We were set to execute the ILS 28C which is what the ATIS was reporting. After contacting Chicago Approach; they informed us to expect the RNAV (GPS) 27R. We updated the FMS with RNAV 27R and briefed the approach. VOR updating was turned off. While on Radar vectors; we were given Direct Welev to join the Final for 27R. After joining the final; I notice that my LNAV was indicated full left defection. The VNAV was full up defection; which would be normal since we were below the crossing altitude.At this point; I heard ATC questioning the aircraft ahead of us about their tracking. I took a look at [the] First Officer indication and saw no LNAV/VNAV indication. We both were baffled and could not figure it out. While discussing the matter with FO; aircraft ahead of us did a go around. Shortly after that; we did the same and requested the ILS 28C. Rest of the flight was uneventful; ILS 28C was executed with no issues. After further discussion with FO; we determined that we were perfectly setup for the RNAV 27R approach. Not only did the aircraft ahead of us go around; but so did the aircraft behind us. ATC called me to ask what occurred. I told them what is on this report. They were not sure as to the problem with this approach. ATC controller asked if I thought this was related to 5G. I told him that I did not know.
Air carrier Captain reported executing a go-around at ORD after experiencing autoflight anomalies possibly related to 5G interference.