What was found
AIR TURN BACK DUE TO ENGINE 2 ANTI-ICE OFF ALERT, ENGINE 2 A-ICE DUCT FAILED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURN BACK DUE TO ENGINE 2 ANTI-ICE OFF ALERT, ENGINE 2 A-ICE DUCT FAILED.