LGCIU A320
I am relatively new to the A320, and I am trying to better understand the Landing Gear indication and the LGCIU's.
https://cimg8.ibsrv.net/gimg/pprune....6d3de2efd6.jpg
https://cimg6.ibsrv.net/gimg/pprune....8a35d75c9a.jpg
Can anyone with access to more detailed information than the FCOM for example Maintenance Manuals enlighten me on this subject, it would be highly appreciated. I am only looking for documented information, all the "rumors" I can find for myself using google. Stay safe and healthy. |
Royale
Landing gear control panel shows indications only from LGCIU1 when it’s supplied electrically. Obviously when LGCIU1 is faulty the indication will be unlocked. It has nothing to do with LGCIU2. Landing gear lever red arrow comes into play below 750ft if flaps are in landing configuration and lever is up. It is either connected directly or indirectly to both LGCIUs or ECAM warning. Below 750ft if gear lever is down and one of the LGCIU1 sensor spuriously detects not down locked it will trigger unlock light on the panel as well as on SD wheel page unlock indication on LGCIU1. But no red light on landing gear lever. If one of the struts is genuinely detected by both LGCIUs as unlocked it will trigger “L/G NOT DOWN LOCKED” ECAM WARNING Continuous repetitive chime with Master warning Unlock red warning on landing gear control panel On the ECAM SD page both red lights on affected gear strut. Red arrow on landing gear lever control panel. ECAM MEMO will remain blue. You may refer to Airbus Safety first issue #10 |
Hi Vilas thank you for replying.
Originally Posted by vilas
(Post 10809526)
Obviously when LGCIU1 is faulty the indication will be unlocked.
|
Originally Posted by Royale
(Post 10809589)
Hi Vilas thank you for replying.
That is actually the crux of my question, and maybe not so obvious to me, there is a big difference between being electrically supplied, and being faulty. As I see/read it is is a possibility that you have an L/G LGCIU 1 FAULT, and at the same time LGCIU1 is still electrically supplied, the fault could be caused by a multitude of other reasons. Taking the FCOM verbatim in that context, the Landing Gear Indicator Panel should still work. |
What is important to know is there are two ECAM warnings Landing gear not down and Landing gear not down locked. They are different. Not down locked warning will come with advice to recycle and if not successful gravity extension.
With gear not down message you need to check on wheel pagea least one green on all three and Landing Memo landing gear DN in green ensures gear is down and locked. |
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