As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L COWL ANTI ICE CAUTION LIGHT IN FLIGHT. DIVERTED TO PIA. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED RIGHT ENGINE COWL ANTI-ICE VALVE PER AWA AMM SUPP 10-094.OPS CHECK GOOD. PERFORMED OPERATIONAL TEST OF THE ENGINE COWL AND ANTI-ICE SYSTEM PER AMM 30-22-00. OPS CHECKED GOOD. PN OFF: 300013000-003 S/N OFF: 2091 PN ON: 5399-00-1 SN ON: 1484B SMG