Aviation Dictionary
آسیب به قسمتهای درونی موتور در اثر ورود اجسام خارجی هنگام کار کردن .
Damage to the components in the gas path of a turbine engine that is caused by ingesting objects that are not part of the engine. Technicians tools carelessly left in the intake ducts as well as debris from the runways or taxiways can cause FOD when the engine is being run on the ground. In flight, the ingestion of ice and birds can cause FOD.