What was found
BRIGHT/DIM KNOB FELL OFF ON F/O CDU. ACFT GROUNDED. REINSTALLED F/O FMCS CDU BRT/DIM KNOB, AS REQUIRED. CK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
BRIGHT/DIM KNOB FELL OFF ON F/O CDU. ACFT GROUNDED. REINSTALLED F/O FMCS CDU BRT/DIM KNOB, AS REQUIRED. CK OK.