JetMechMD80 From United States of America, joined Jul 2004, 380 posts, RR: 6
Reply 4, posted (11 years 1 week 2 days 8 hours ago) and read 3830 times:
Probably just soot from the engine. Not really a pretty sight. I'm sure it can be easily wiped/washed off. I'm quite sure someone here can give you a better answer.
It is just soot, probably from the APU, as others have stated.
But.......Its not easily wiped/washed off. And when you get it on your skin, you might as well just wear off a layer of skin. It does not want to come off, no matter what you try. My wife is always accusing me off not washing my hands. Yeah i just spent 1/2 hour taking a layer of skin off with a brilo pad, but I didn't wash my hands.
Jetstar From United States of America, joined May 2003, 1702 posts, RR: 11
Reply 9, posted (11 years 1 week 11 hours ago) and read 3420 times:
The normal escape path from the over wing emergency exits on the DC-9 family of aircraft is to head to the rear of the wings and slide down the flaps, which would be extended to the ground, that's why the arrows point to the rear.
To prevent the exhaust soot from being embedded in your skin, there is a product on the market called ProTec, also known as "Invisible Glove". It comes in a tube like toothpaste and you should be able to get it in hardware or auto parts stores.
It seals the pores of the skin and is water soluble. It comes off when you wash your hands. Almost all the soot will wash off with a good hand cleaner or Java hand soap, it tends to dry the skin so you will need to use a good skin cream after washing your hands. I used it when working in jet exhaust areas and it helped a lot, also is great when working on car engines.
DalMd88 From United States of America, joined Jul 2000, 2725 posts, RR: 14
Reply 10, posted (11 years 1 week 6 hours ago) and read 3361 times:
The black lines on the wing are an anti skid strip. The black lines on the tail cone are not on the tail cone. They are louvered vents just forward of the removable cone. They vent the unpressurized aft section.