As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENG MAINTENANCE MESSAGES 73-30902 (T12 SIGNALS DISAGREE), 73-21702 (ADIRU TAT DATA AND THE T12 SIGNAL DISAGREE) AND 73-20812 (THE T12 SIGNAL IS OUT OF RANGE). DEFERRED PER T/C 78273000. GROUNDED - YES. REF B737-800 FIM 73-26 TASK 805 REPLACED T12 SENSOR REF B737-800 AMM 73-21-05. OPS CHECK GOOD REF AMM 73-21-00. ALL T12 SENSOR FAULTS CLEARED ON CDU.