Pizzapolli From United States of America, joined Oct 2001, 243 posts, RR: 0 Posted (11 years 2 months 2 weeks 14 hours ago) and read 2850 times:
What is that opening that you see on the fuselage of DC-10 in front of the wing below the window line. It looks like a fuel door thats sideways, but of couse is not. Is it some sort of air intake for the APU? Heres a link to a picture with one showing, its right below the G in Varig:
Iahcsr From United States of America, joined Jun 1999, 3424 posts, RR: 42
Reply 4, posted (11 years 2 months 2 weeks 6 hours ago) and read 2551 times:
For those who choose not to read the link above, the short answer is that it's part of the pressurization system. The DC-9/MD-80 has a similar valve design, but it's located below the left engine, so it's not as visible.
JETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 5, posted (11 years 2 months 1 week 4 days 22 hours ago) and read 2299 times:
It's a pressurization dump valve. DC10's arent pressurized on the ground. When the plane lands the dump valve opens to equalize pressurization if the auto/manual system fails to keep the pressurization schedule which should relieve pressure 1000' (?) above field elevation.