What was found
LT COWL ANT-ICE CAUTION MSG WITH COWL ON. CAME ON IN FLIGHT, DID NOT RECTIFY. COMPLIED WITH QRH, AIR DIVERT TO PIT, LANDED AT AROUND 45,000 POUNDS, NORMAL LANDING. R & R LT COWL ANTI-ICE VLV IAW AWAC SUPP 10-094. R & R LT COWL ANTI-ICE PRESS SWITCH IAW IAW AMM 30-22-07, IAW LP 251185 3,4 FOR OPERATIONAL CHECKS.