It consists of a moveable flap which draws hot air into the engine intake.
One crow sucked into his engine intake could make them a permanent part of this man-made swamp.
The engine intakes are bigger, and have a revised inlet.
Bleed air is also used to heat the engine intakes.
This is achieved by recovering waste energy in the exhaust and feeding it back into the engine intake.
One major external difference was the replacement of the side mounted engine intakes with a chin intake.
Wheel stays clean, and engine intakes stay closed until takeoff.
They blocked the pilot's forward view to an extent, and set up turbulence in the engine intakes.
It was attributed to accidental ingestion of a foreign material in the engine intake.
In practice these latter types of entry are never used for engine intakes.