I meant when they remove the whole tailplane assembly from the aircraft, Boeing will want it sent back for repair.

If it’s anything like on a B737 removal is not a heavily complicated tasks.

You’d be surprised how often the vertical and horizontal stabs. are removed and put back on 🙂

Should be a fairly simple (in Aircraft mechanical terms) task of removing the Tail cone, APU ducting an the surrounding metal work from the tail and then easing it out once it has been mechanicaly seperated from all the workings inside. The horizontal stabs come off as one piece.

I think the process is identical for the 737 and most Boeings.