As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L ELEV PITOT LIGHT ILLUMINATED WHILE CHECKING FLIGHT CONTROLS ON TAXI OUT. GROUNDED - YES. REFERENCE B737-800 AMM 27-31-94-000-801/400-801. REMOVED AND REPLACED LEFT HAND ELEVATOR PITOT PROBE. PERFORMED ELEVATOR PITOT LEAK TEST REFERENCE AMM 27-31-17 TEST PASSES. PERFORMED HEATER TEST PER AMM 30-31-00 TEST NORMAL.