As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 9038 - DURING CLIMB, F/O'S AIRSPEED INDICATOR WAS SHOWING 10 KTS LOWER THAN THE CAPT AND THE DIFFERENCE INCREASED WITH THE ALTITUDE UP TO 50 KTS LOWER FL230. SELECTED F/O'S STATIC SELECTOR TO ALT FOR LANDING. REMOVED AND REPLACED KNOB ALT PITOT SELECTOR VALVE. PERFORMED OPS CHECK PITOT STATIC SYSTEM. FIRST OFFICER AND ALTERNATE, FOUND NORMAL IAW MM 34-12-0. (M)