Orange object on back of jet-engine pylons, what is it? Watching this Video of a L-1011, I noticed an orange/brown object on the back of the jet-engine pylons I never saw before. 


What is it?
What's the purpose of it?
Manu H is right. It is an IR jammer device. Saudi (corrected from the comment of David Richerby:)Royal Flight airliners tend to have them (root of the wing, next to the light)...