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United 149 out of KEWR hydraulic issue

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United 149 out of KEWR hydraulic issue

Old 25th Sep 2022, 17:18
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United 149 out of KEWR hydraulic issue

Not quite sure what "hydraulic issue" we are witenessing here


Also doesn't the 777 have fuel jettisoning capability ?
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Old 25th Sep 2022, 20:07
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Article with video here: https://simpleflying.com/united-airl...sparks-debris/
I'm not too sure what part of the hydraulics is doing this, my first thought was a gear or airconditioning pack issue.
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Old 25th Sep 2022, 22:31
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Originally Posted by Jhieminga View Post
Article with video here: https://simpleflying.com/united-airl...sparks-debris/
I'm not too sure what part of the hydraulics is doing this, my first thought was a gear or airconditioning pack issue.
position sure doesn't look like engine related. Whatever let go had a lot of heat in it, the components that hit the ground are still glowing! don't see that from major kitchen appliances... pack ACM have a fair amount of energy, can chomp right through the fairing with ease.
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Old 25th Sep 2022, 22:56
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Air driven hyd pumps. The 777 has two in that position. They operate 'on demand' when large demands are put on the system. EG. L/Gear and or flaps.
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Old 26th Sep 2022, 09:54
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Originally Posted by HOVIS View Post
Air driven hyd pumps. The 777 has two in that position. They operate 'on demand' when large demands are put on the system. EG. L/Gear and or flaps.
Hmm was unaware of those - kind of a RAT ?
Seems they failed rather spectacularly !
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Old 26th Sep 2022, 11:10
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They’re driven by bleed air, not external airflow like a RAT.
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Old 26th Sep 2022, 13:47
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Originally Posted by HOVIS View Post
Air driven hyd pumps. The 777 has two in that position. They operate 'on demand' when large demands are put on the system. EG. L/Gear and or flaps.
Thanks, I considered those but didn't know where they hide within the 777 airframe.
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Old 27th Sep 2022, 02:42
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Originally Posted by Jhieminga View Post
Thanks, I considered those but didn't know where they hide within the 777 airframe.
Right hand side, just by and below the main wing trailing edge.
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Old 27th Sep 2022, 07:36
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Originally Posted by fdr View Post
Right hand side, just by and below the main wing trailing edge.
I'm confused..that sounds like the RAT location... I think Jhieminga was referring to the whereabouts of the ADPs
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Old 27th Sep 2022, 07:48
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Originally Posted by fdr View Post
Right hand side, just by and below the main wing trailing edge.
Are you sure they're not on the port side?


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