Nextgenerationmechanic - Vortex Control Device, Fan Cowl Chine, or as I call it an 'engine strake'. Is a fin that controls the airflow along a part of the wing. Sometimes you see
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Boeing 777 grounding explained: Pratt and Whitney engine failure involved in two incidents on same day
![Airbus A320 Family of Aircraft Engine Fan Cowl Door Loss Incidents Timelines – FOD Prevention (Foreign Object Debris Prevention) Airbus A320 Family of Aircraft Engine Fan Cowl Door Loss Incidents Timelines – FOD Prevention (Foreign Object Debris Prevention)](http://fodprevention.com/wp-content/uploads/2018/12/a319.jpg)
Airbus A320 Family of Aircraft Engine Fan Cowl Door Loss Incidents Timelines – FOD Prevention (Foreign Object Debris Prevention)
![Metallic hinges attaching the composite fan cowl to the main structure | Download Scientific Diagram Metallic hinges attaching the composite fan cowl to the main structure | Download Scientific Diagram](https://www.researchgate.net/publication/260322714/figure/fig3/AS:297222823530497@1447874851050/Metallic-hinges-attaching-the-composite-fan-cowl-to-the-main-structure.png)
Metallic hinges attaching the composite fan cowl to the main structure | Download Scientific Diagram
![boeing 737 - What does the area around the fan blades in the engine nacelle contain? - Aviation Stack Exchange boeing 737 - What does the area around the fan blades in the engine nacelle contain? - Aviation Stack Exchange](https://i.stack.imgur.com/sdqQ0.jpg)