As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAS/MACH SELECTOR ON MCP NEARLY INOP. IF SELECTOR KNOB TURNED EITHER DIRECTION THE DISPLAY MAY MOVE 1 DIGIT THEN BACK TO ORIGINAL SPEED SELECTED BY PULLING OUT ON SELECTOR KNOB DESIRED SPEED COULD BE SET. GROUNDED - YES. REMOVED & REPLACED MODE CONTROL PANEL REF AMM 22-11-34-400/801. INSTALLATION TEST PASSED. PERFORMED LLM TEST LRU REPLACEMENT FOR MCP REF AMM 22-11-34/501 & LAND VERIFY TEST REF AMM 22-11-00/201. ALL TESTS PASSED.