As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R ELEV PITOT LIGHT CAME ON DURING TAXI TO THE RUNWAY. GROUNDED - YES. REF B737-800 FIM 30-31-TASK 809, DISCONNECTED D638 CONNECTOR & INSPECTED PINS NO DEFECTS NOTED, REINSTALLED CONNECTOR R ELEV PITOT LIGHT REMAINS ON. REPLACED RH ELEV PITOT PROBE REF B737-800 AMM 27-31-94 OPS CHECK GOOD, NO DEFECTS NOTED.PERFORMED ELEVATOR PITOT SYSTEM LEAK, OPS CHECK GOOD REF AMM 27-31-17-790-801.