Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 207; Flight Crew Total 4036; Flight Crew Type 4036
Confusion; Distraction; Human-Machine Interface; Troubleshooting; Workload
Aircraft Equipment Problem Less Severe
Flight Crew Overcame Equipment Problem
Aircraft; Equipment / Tooling; Software and Automation
As the Captain continued his approach; downwind to MSY airport; the First Officer's radar altimeter began to flash; and display random; incorrect altitudes. Furthermore; a constant sound of a warning horn sounded; each time the radar altimeter mentioned displayed an altitude below 1;000 ft. When the landing gear was selected down; the horn silenced; and the radar altimeter in question now matched the Captain's radar altimeter. We landed without incident. A maintenance entry was filed; and a thorough bite test was performed by same. No faults were found. Maintenance Control suggested that the irregular indications we received may have been caused by 5g interference.
An air carrier First Officer reported their Radio Altimeter malfunctioned while on downwind to MSY.