PPRuNe Forums - A320 G+B hydraulic failure

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- - A320 G+B hydraulic failure (https://www.pprune.org/tech-log/657169-a320-g-b-hydraulic-failure.html)

serega-navigator

19th December 2024 04:13

Moment to activate Direct Law

Hello guys 🙌
Is there any thoughts, why the direct law is activated by L/G extension?
Some of failures like all SEC’s fault bring the A/C to Direct Law after landing Flaps extension. But for most double failures the moment to drop L/G only triggers the Direct Law activation. Why?

Global Aviator

19th December 2024 04:42

Quote:

Originally Posted by RMC (Post 11610739)

Interesting excercise in the sim. In reality the hydraulic system is the most reliable on the aircraft. Complete Failure of one system is incredibly rare failure of two at the same time is only likely to happen with a catastrophic/ uncontained engine failure. Out of interest, how many have lost one hyd system (and what caused it)?

A long time ago, think it was the yellow I lost, had a leak and all fluid gone…..

Speed_Trim_Fail

19th December 2024 08:50

Quote:

Originally Posted by Global Aviator (Post 11789878)

A long time ago, think it was the yellow I lost, had a leak and all fluid gone…..

Likewise lost one system, and it was a bit of a non event really - this was on a later MSN however so loss of yellow also meant loss of NWS.

Loss of the B system on the 737 was somewhat more annoying, but that is in the dim and distant past for me!

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