As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING PITOT/STATIC GROUND FUNCTION TEST, IT WAS NOTED THAT PILOTS (AFT) AIRSPEED INDICATOR WOULD ACCURATELY INDICATE AN INCREASE IN AIRSPEED BUT WOULD NOT SHOW A DECREASE ONCE PITOT PRESSURE IS RELIEVED AND BROUGHT BACK TO AMBIENT. THIS WOULD CAUSE THE ACFT TO PROPERLY KNOW AIRSPEED WHEN ACCELERATING , BUT WOULD NOT INDICATE THE ACFT DECELERATION AND CRITICAL LANDING/STALL SPEED.