What was found
DURING CLIMB RECEIVED AN A/ICE DUCT WARNING MSG, FLIGHT RETURNED TO JFK. PERFORMED ENGINE RUNS WITH A/ICE SYSTEM ON, DISCREPANCY COULD NOT BE DUPLICATED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CLIMB RECEIVED AN A/ICE DUCT WARNING MSG, FLIGHT RETURNED TO JFK. PERFORMED ENGINE RUNS WITH A/ICE SYSTEM ON, DISCREPANCY COULD NOT BE DUPLICATED.