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On Boeing and Airbus aircraft, the APU controller and electronic control box (ECB) is located aft. Why is it located here, where no ventilation is available?

Why it is isolated from different line-replaceable units (LRUs)?

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  • $\begingroup$ There are various inlets for APU. Google "APU inlets" with a specific aircraft type, and you get pictures (and location). APU is used a lot on ground, so you want to place where it will not interfere with ground handling. I think Centre-Of-Mass may be also relevant (on empty aircraft). $\endgroup$ Jan 23, 2023 at 15:49
  • $\begingroup$ @GiacomoCatenazzi: can you post it as an answer? I think it's worth some upvotes 😉 $\endgroup$
    – sophit
    Jan 24, 2023 at 13:25
  • $\begingroup$ The question is asking why the electronic controller for the APU is located aft; the comment by @GiacomoCatenazzi talks about why the APU itself is located aft. I don't think that would be an answer to the stated question. $\endgroup$
    – Ralph J
    Jan 26, 2023 at 21:39

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