Looking for detailed Orbiter schematics - specifically the Body Flap

Jul 16, 2020
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I recently purchased a few space-flown shuttle objects in an auction. I am looking for detailed schematics online that I can pour over and attempt to locate how my specific objects fit on the shuttle. I've seen several schematics online so far, but specifically I need an ultra-detailed look at the body flap (the area under the rear rockets)
My oleophobic filter canister was installed in the body flap. It's the size of a soda can (roughly) and I'm trying to figure out how it fit in, how many there were inside the body flap, etc. (and what did it do?)

In researching this, I've heard that my best bet may be filing a FOIA request directly with NASA to get more information on the pieces I have. I'm looking for which specific shuttle these scrap pieces were from and hopefully which missions they were a part of. If anyone knows any other resources I should check out, that would be helpful.

Thanks!
Here is the canister. More pics will follow.
https://flic.kr/p/2jm3m1g View: https://flic.kr/p/2jm3m1g
 

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