As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRSPEED SELECTOR KNOB INOP REMOVED KNOB AND VERIFIED THAT THE SHAFT IS BROKEN. R&R MODE CONTROL PANEL PER AMM 22-11-02-022-001 AND 22-11-02-402-007. PERFORMED MCDP GROUND TEST 4 AND TEST 30PER AMM 22-00-02/201. ALL TESTS PASSED. AC REMAINS FULL CAPIBILITY. OK TO CONTINUE.