As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 370 GOT ANTI-ICE DUCT WARNING. AOM VOL 1 PROCEDURES FOLLOWED CONCUR WITH DISPATCH, MX TO DIVERT TO XNA. TROUBLE SHOT IAW FIM 36-21-07, REPLACED INSULATORS MT176P1, MT176P2, MT175P2 & MT178P1. DURING TROUBLESHOOTING REPLACED BLEED LEAK DETECTION HARNESS FROM J810 TO MT178P2. OHMS CHECKED GOOD IAW FIM 36-21-07 & ECSPM 20-26-13.