As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT ON FLIGHT 2790, F/O'S AIRSPEED INDICATOR FROZE AT 260 KNOTS. AIR RETURN TO MSP. MAINTENANCE DRAINED AND PURGED NR 2 PITOT SYSTEM WITH DRY NITROGEN. NR 2 PITOT SYSTEM OPS CHECK GOOD AND LEAK CHECKS GOOD IAW SF340 M/M CHAP 34.