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
TATA To Manufacture Boeing 737 Fan Cowls - YouTube
10 - 整流罩 | A320FM Study Notes
Goodrich gets nod for new V2500 cowl design | News | Flight Global