Ok, If you look behind the Nose Gear Doors, there is a big black street that looks like someone took a paintbrush and went strack across the fuselage. What is that big black streak? I would guess Hydraulic Fluid, but I am not sure.
Broke From United States of America, joined Apr 2002, 1322 posts, RR: 4 Reply 3, posted (10 years 3 months 1 week 6 days 8 hours ago) and read 1260 times:
It is usually a combination of skydrol, CIC's (corrosion inhibiting compounds), greases, and any other vaguely liquid material that may be splashed into or out of the wheel well.