View Full Version : United 149 out of KEWR hydraulic issue
zambonidriver
25th Sep 2022, 16:18
Not quite sure what "hydraulic issue" we are witenessing here
Takeoff video
Also doesn't the 777 have fuel jettisoning capability ?
Jhieminga
25th Sep 2022, 19:07
Article with video here: https://simpleflying.com/united-airlines-boeing-777-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.
Article with video here: https://simpleflying.com/united-airlines-boeing-777-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.
HOVIS
25th Sep 2022, 21:56
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.
zambonidriver
26th Sep 2022, 08:54
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 !
Locked door
26th Sep 2022, 10:10
They’re driven by bleed air, not external airflow like a RAT.
Jhieminga
26th Sep 2022, 12:47
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.
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.
wiggy
27th Sep 2022, 06:36
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
DaveReidUK
27th Sep 2022, 06:48
Right hand side, just by and below the main wing trailing edge.
Are you sure they're not on the port side?
https://cimg4.ibsrv.net/gimg/pprune.org-vbulletin/865x475/boeing_777_adp_location_6aba51ce92afaf825ce3499de0643a0eebf0 0f9b.jpg