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This is getting a serious problem now on older aircraft, wiring that moves with the landing gear and switches are getting brittle and the outer insulation is cracking with both movement and oil. I know inspecting this wiring is almost impossible and the costs would be extremely high.
But to replace the wiring on the nose gear switches is quite easy as it is all wired to the terminal block in the top right nose gear bay, these are the only wiring that moves with the gear, the main consist of the up/down micro switches which are fixed.
I you do get intermittant problems with the gear indications and suspect the wiring on the nose gear, it would be best to rewire it, then you have it covered.
Regards
Pete
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