As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT COWL, ANTI-ICE FAILED OPEN, COMPLIED WITH QRH, VLV WOULD ONLY CLOSE WHEN LT 14TH STAGE BLEED SOV WAS CLOSED. DIVERTED BACK DUE TO ICING CONDITIONS. COWL ANTI-ICE VLV IAW AMM 30-22-01. OPERATIONS CHECKED GOOD. R & R LT PRESS RELIEF VLV IAW AMM 30-22-04. OPERATIONS CHECKED GOOD.