B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 64.77; Flight Crew Total 10572.08; Flight Crew Type 10572.08
Aircraft Equipment Problem Less Severe
Aircraft
On departure we had an airspeed disagreement and we quickly determined the First Officer side and standby airspeed were reliable. We ran the QRH and contacted [Maintenance Control]. The Captain discussed the issue with [Maintenance Control] through an ARINC phone patch and decided to continue the flight as we had reliable airspeed and the disagreement message had extinguished. As we prepared for the descent we had the airspeed disagree and altitude disagree message illuminate. We ran the QRH for the Alt disagree and determined the First Officer and standby instruments were reliable and were able to proceed clear of clouds to an uneventful approach and landing in ZZZ.
B737 flight crew reported aircraft encountered unreliable airspeed indicator.