Chosen Solution
The Ligntning Dock Connectior in my 16GB iPad Air (1474) will no longer accept the charging cable. When inserted, it never “clicks” into place and pops back out again. The cable works fine with my iPhone 5S.
You need a new charging port. Downside is it needs to be soldered onto the logic board. I know @refectio and @teetop do board level work