Hole is from drain. Is this normal healing process or should I contact PS? 2 weeks post TT. (photo)

It is not uncommon to have small open wounds the first weeks after a tummy tuck, it will heal in time just keep it dry and covered with gauze, and continue to follow your PS's instructions.Best wishes.

Hello dear!!
Thanks for the question and provided information as well. 
You are still early on the healing process, it can take up to 6 months to see your final results, so please be patient. At the stage you're in, this is very normal. If you have any concerns, I suggest you to follow up close with your plastic surgeon.
Good luck :)

Kelly,Congrats on having the procedure.  WHat you are experiencing is not uncommon.  Small  areas of the incision may open at any time over the first 1-4 weeks of an abdominoplasty.  Yellow non smelling drainage may also occur.  Your incision does not appear to have any signs of infection.  The yellow underneath is fat, some alive and some dead (fat necrosis) which will heal over the next few weeks.Good luck.Dr T