As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF 2 SHOWS FAIL LIGHTS IF HF SENSOR SWITCH IS INCREASED (DIALED CLOCKWISE), FAIL LT EXTINGUISHES. INTERMITTENT FAILURE. GROUNDED - YES. PERFORMED THE TEST OF #2 HF REF B737-800 FIM 23-11 TASK 801 OPS NORMAL - NO FAULTS ON PANEL ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL SEAMC RAY NOTIFIED.