As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H FMCS CONTROL DISPLAY UNIT (CDU) HAS DAMAGED HARDWARE. GROUNDED - YES. REMOVED AND REPLACED FMCS (#1 - L/H SIDE) CONTROL DISPLAY UNIT REF B737-900 AMM 34-61-01-000/400-802. ACCOMPLISHED CDU SOFTWARE CONFIGURATION CHECK REF AMM 34-61-00-750-802. PER IPC 34-61-01-03 CDU OPS P/N 3463-SMI-001-02. ALL TESTS PASSED. ALL C/BS RESET.