View Full Version : A320 LGCIU 1+2 Fault
bringbackthe80s
9th Jun 2013, 09:19
Hi all
a quick question please. If i get lgciu 1 and 2 fault, given the lgciu 1 is not electrically supplied (so no indication on the "3 green" panel) how do you confirm the gear is down and locked? (just with the landing gear lever being down/do you still get the red arrow if it s NOT down and locked?)
Thank you
nitpicker330
9th Jun 2013, 10:04
On the A330 the panel lights come from a independent part of LGCIU 1. Even if LGCIU 1 has failed as long as it is electrically powered the sensors for the gear lights in the panel will still work.
So to summarize:--- there are 3 proximity downlock sensors on each gear, system 1, 2 and the independent.
Edited for the third time!!
Why would LGCIU 1 not have power in that scenario?
Field In Sight
9th Jun 2013, 15:10
You get the Continuous Repetitive Chime in the following configurations:
http://i1119.photobucket.com/albums/k630/mike_a_mckay/ScreenShot2013-06-09at160606.png (http://s1119.photobucket.com/user/mike_a_mckay/media/ScreenShot2013-06-09at160606.png.html)
J.L.Seagull
9th Jun 2013, 21:08
LGCIU 1 doesn't have to be powered. It just has to be fitted to the aircraft for the indicator panel green lights to have a complete circuit. Power comes from the PSCU.
nitpicker330
10th Jun 2013, 08:31
Okeydokey!! I'll amend my post then, ta.:ok:
Should have looked at FCOM 1 instead of relying on my memory!!
nitpicker330
10th Jun 2013, 08:44
Actually I just looked at FCOM 1 and it says......
Note : lights on the LDG GEAR indicator panel light up as long as the LGCIU 1 is electrically supplied.
mmmmmmm
So, as long as LGCIU 1 is powered ( might be inop ) then the lights in the Panel will work.
Back to edit my post again........:}
J.L.Seagull
10th Jun 2013, 09:56
I stand corrected! Then again, let me check with my ex-colleagues from engineering. I'm sure a wiring diagram will settle this.
:O
Ollie Onion
11th Jun 2013, 00:59
I think you are both right, the LGCIU 1 just needs an electrical supply to it for the indications to work. The actual LGCIU 1 could be totally screwed, but as long as the aircraft is still supplying an electrical charge to it then the landing gear indicators will work.
*Lancer*
11th Jun 2013, 06:48
And if the LGCIU 1 CB has tripped?
Screwballs
11th Jun 2013, 14:18
Would be very interesting to see the wiring diagram.
Screwballs