B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 228; Flight Crew Total 15559; Flight Crew Type 3936
Distraction
Aircraft Equipment Problem Less Severe
Flight Crew Overcame Equipment Problem
Aircraft; Environment - Non Weather Related
On departure out of DCA the RA flag flashed on the Captain's side for less than a second. It was approximately 8;000 ft. over RGIII intersection. No other abnormalities after that; until on approach into IAH on 26L. It happened 3 more times about a second each time at approximately 3;000 ft. and on the 3rd time; the AP disconnected. We notified ATC per the 5G Pilot Bulletin and hand flew the aircraft to a normal landing. After parking at the Gate; I submitted a maintenance write up and called the FODM and Dispatcher and submitted [a report].
B737 flight crew reported encountering possible 5G interference while departing DCA and again during descent into IAH.