B737 flight crew reported aircraft encountered unreliable airspeed indicator.

Attributes
ACN	1750361
Time
Date	202007
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Flight Phase	Climb Descent
Component
Aircraft Component	Pitot-Static System
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 64.77 Flight Crew Total 10572.08 Flight Crew Type 10572.08
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

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 tomc 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.

Original NASA ASRS Text

Title: B737 flight crew reported aircraft encountered unreliable airspeed indicator.

Narrative: 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 TOMC 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.