I had to de-fuel a Piper Arrow a few years ago, for my CPL skills test. Not 100% sure how they did it, I think they jammed the fuel drains open. No idea what happened to the fuel afterwards.
In my case, I'd asked for it to be filled to tabs, and done my w+b calcs with it filled to tabs. The previous pilot had filled it up to the top, expecting to burn off enough fuel to get it to tabs for my test. Unfortunately, the aircraft went tech, so the previous pilot didn't fly it at all. The tech problem was fixed for my test, but the tanks were still full. I re-did the w+b calcs and found that we were out of CofG limits - and adding the ballast required to bring CofG into limits would have taken us over the MTOW. The school were not pleased - but with the examiner waiting, they didn't really have any option except to take fuel out!
FFF
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