In rec.aviation.piloting Mxsmanic wrote:
Leadfoot writes:

Ground hydraulic units use green hoses

Perhaps that is it, then.

But I've never seen one hooked up near the wing tip on a 747. Usually you
use the hydrualic servicing panel in the gear wheel well.

That's what I would expect, so it was puzzling.

Since the airplane is sitting with engine covers on in the middle of
one of the EMP test stands at Kirtland AFB, it is most likely some
sort of instrumentation.

And, if you look closely, there another connection to the other wing
tip.

But whatever it is, it certainly isn't fueling.

--
Jim Pennino

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