|Quoting Maintenance Manual (Reply nil):|
A visual check of the position of the flaps[slats] can be done through the windows in the fuselage that are adjacent to the flaps[slats]. The windows to be used are identified by a brown triangle on the sidewall panel above them.
|Quoting HAWK21M (Reply 2):|
Any Pics of these panels.Difficult to Visualise.
|Quoting Glidepath73 (Reply 4):|
How often, or in which case is the crew checking the flaps/slats optical?
|Quoting ExitRowAisle (Reply 7):|
I saw this question in Airliners magazine once, I believe. The triangles were not to show where the crew could visually inspect the wings. They were to mark locations in the cabin where emergency lifelines were stowed in the overhead bins.
|Quoting Glidepath73 (Reply 13):|
But for what is it really used?
Aguilalatina wrote:Sorry guys but there is no needs in an advance new generation aircraft to check the position of the leading edges or flaps from the passenger windows, since we have in the ECAM slats flaps digital indicators.
Also we have in the cockpit ice detectors, this in case of icing conditions, I know in the winter season we have to do sometimes a pretake off evaluation check to check if there is any ice built up in our wings, but there is anything in the FCOM is saying to go back to the black triangles to check if there is any icing or to check the position of the leading edges and flaps!
This two sets of triangles are for weight and balance purposes, the first set of triangles are located to differentiate between zone OA-OB-OC if you check the weight and balance load sheet, you will see the passenger cabin distribution zones, they are 3 and are marked in the passenger cabin with black dots, this to make last minute changes on the % of CG, for quick determination for the crew, to shift passengers from BETWEEN ZONE OA-OB -OC. The first sets of triangles ZONE OA mark raw from 1 to 10 (first 60 pax) the second sets of triangles ZONE OB mark raw from 11 to 21 (second 50 pax) and ZONE OC is the raw from 21 to 31 last 60 pax this behind the second set of black triangles. The pax raw seat configuration maight change, depends on model and airplane configuration, for example if there is first class or not or VIP. The one I explaned here is for version A-320-200 VERSIÓN 180 YC
RetiredWeasel wrote:You do realize that you are talking to group who posted this topic 12 years ago..??!!
Aguilalatina wrote:This two sets of triangles are for weight and balance purposes, the first set of triangles are located to differentiate between zone OA-OB-OC if you check the weight and balance load sheet, you will see the passenger cabin distribution zones, they are 3 and are marked in the passenger cabin with black dots, this to make last minute changes on the % of CG, for quick determination for the crew, to shift passengers from BETWEEN ZONE OA-OB -OC.
trijetsonly wrote:I'm not aware of any airline with only 3 passenger trim compartments in the A320.
Most use 7 (0A to 0G) in the A320 to keep the curtailments low and the operational limits wide.
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