PPRuNe Forums - APU Speed Droop

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Danial9874

8th June 2024 06:25

APU Speed Droop

Hi guys,

B737 APU ECU energize ignition system if APU engine speed goes below 95% during APU operation (speed droop)

What is speed droop ? Tried to google but hardly understand the meaning of speed droop 😔

Thank you

greatwhitehunter

24th July 2024 14:25

It's simply a drop in APU speed. Depending on the cause of the droop the energised ignition sytem might stop an APU shutdown.

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