fschweighardt, this is from the 2008 issue but the 2011 issue is basicly the same.

341.3.4 Progressive Sampling for Examination.

When required spot or random examination reveals a
defect, then
(a) two additional samples of the same kind (if
welded or bonded joints, by the same welder, bonder,
or operator) shall be given the same type of examination

(b) if the items examined as required by (a) above
are acceptable, the defective item shall be repaired or
replaced and reexamined as specified in para. 341.3.3,
and all items represented by these two additional samples shall be accepted, but

(c) if any of the items examined as required by (a)
above reveals a defect, two further samples of the same
kind shall be examined for each defective item found
by that sampling

(d) if all the items examined as required by (c) above
are acceptable, the defective item(s) shall be repaired or
replaced and reexamined as specified in para. 341.3.3,
and all items represented by the additional sampling
shall be accepted, but

(e) if any of the items examined as required by (c)
above reveals a defect, all items represented by the progressive sampling shall be either
(1) repaired or replaced and reexamined as
required, or
(2) fully examined and repaired or replaced as necessary, and reexamined as necessary to meet the requirements of this Code

(f) If any of the defective items are repaired or
replaced, reexamined, and a defect is again detected in
the repaired or replaced item, continued progressive
sampling in accordance with (a), (c), and (e) is not
required based on the defects found in the repair. The
defective item(s) shall be repaired or replaced and reexamined until acceptance as specified in para. 341.3.3.
Spot or random examination (whichever is applicable)
is then performed on the remaining unexamined joints