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Only vaguely related to the original article but I've often wondered what causes the loud screeching noise as an Airbus 320 shuts down. I did a bit of reading a
by VBprogrammer 7y ago
Only vaguely related to the original article but I've often wondered what causes the loud screeching noise as an Airbus 320 shuts down. I did a bit of reading around it and came to the conclusion it is actually the PTU (basically a hydraulic motor directly coupled to a hydraulic pump which allows coupling the hydraulic power between the two systems without risking bringing down both in the event of a failure) trying to keep the pressure in one system up as the engine driven pump stops.
Anyone happen to know if I'm correct?
- omegant 7y agoYes it’s the PTU. If the noise is in the parking with engines stopped it maybe the yellow electric pump, used to open and close the cargo doors.
- zymhan 7y agoI'd recommend asking on aviation.stackexchange.com
- SpikedCola 7y agoYou are correct. Here's[0] a great video on the subject if you're interested. [0] https://m.youtube.com/watch?v=SCplhq1xoYE https://m.youtube.com/watch?v=SCplhq1xoYE