Rub mark on Stabilizer seal structure

[Sumanth.eswar]

During general inspection observed rub mark /chaffing on the structure of LH Horizontal stabilizer. Can any one help me figure out what could be the reason ?
Note :SB 53-1252 has been carried out 16 months ago and since then the, my 737-700 has clocked 4000 flight hours and 3000 cycles. Is the above said problem normal ????

[Deaddog]

It's from the sliding seal.

[Sumanth.eswar]

Is ths a common problem ???

What is the rectification action to be followed ?

[sjap]

You can rework the damaged area iaw SRM, but there are tight limits, probably when you go beyond these limits you have to get a Boeing approval for the extended damage. Its a very common problem. The sliding seal should not contact the lugs but as they are replaced sometimes, the attachment brackets must be transferred to the new seal and then you can have a slightly different sliding seal position (more up or down than original). Make sure that the seal and other seals/panels which are installed in that corner, do not hit the lug-structure.