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On the A380 wing are at least 3 red circle each side. There seems to be a black part inside. Is this a dip stick, or something else?

enter image description here

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  • $\begingroup$ I think they are the indicators for the gear down/locked visual inspection. $\endgroup$ – Ron Beyer May 11 at 14:05
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    $\begingroup$ Hi Ron, picture was taken on ground, gear down and locked. The gear system consists of body and wing landing gear each side. The number of 3 indicators would not fit. $\endgroup$ – Björn May 11 at 14:48
  • $\begingroup$ The only thing I found from FCOM and 'Airplane Characteristics for Airport Planning', is that in each wing there is 'YELLOW HYDRAULIC GROUND CONNECTOR' and 'GREEN HYDRAULIC GROUND CONNECTOR'; however I am not sure if these are under the wing instead of on top. $\endgroup$ – Afe May 11 at 19:58
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    $\begingroup$ @Afe: those are under, see FCOM 20-30 pages 10 and 11. $\endgroup$ – ymb1 May 11 at 23:14
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They are likely attach points for safety harness equipment. Workers working on top of the wing attach gear that functions as anchors for lines that run the length of the wing, then attach their safety harness to the line.

enter image description here

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  • $\begingroup$ The hole is as small as the rivets nearby. I highly doubt it's likely. The safety equipment shown could be based on suction (vacuum anchor). $\endgroup$ – ymb1 May 11 at 23:03
  • $\begingroup$ Same method is used for all Airbus wings, but I don't remember similar things on the A320 wing (which I have observed a lot of times) $\endgroup$ – Afe May 11 at 23:54
  • $\begingroup$ @ymb1 you don't need a huge orifice to support a simple line anchor. Suction is not an option, that is unsafe. $\endgroup$ – Juan Jimenez May 13 at 7:54
  • $\begingroup$ Also, if you look carefully, you'll also see that the anchors are also for the pneumatic hoses. The worker has a harness, and that has three lines, one for the tool, one to secure him to an anchor point behind him, and one to an anchor point in front of him. $\endgroup$ – Juan Jimenez May 13 at 8:04

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