As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCP ALTITUDE SELECTOR KNOB INOP. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL REF MM 22-11-34/401 OPS CHECK GOOD REF B737-800 MM 22-11-34-740-801. LLM LAND VERIFY COMPLETED REF MM 22-11-00/201. LLM TESTS PASS SEAMC WILL NOTIFIED.