they went back india on sep'06 so there will be no problem with extension permit.
Hi:
Make sure that you can show that their long stay was of a "temporary nature." People often make the mistake of believing that abandoning status is only derived from expiration dates of Re-entry Permits or staying away for longer than a year without a Re-entry Permit.
Abandonment is a complex area of the law. Note, I have seen several cases where someone was deemed to have abandoned status before a year was over ---- in one case, with an absence of only 3 months. These cases turn on the particular facts - in that particular case, the parents left a few days after they received the PR status, could demonstrate no ties to the US other than a child etc. etc. The only reason for the return was to move more stuff over to India - CBP didn't like it needless to say!
Another scenario that often arises is parents who come back every year for 1 month or so to avoid staying out for more than a year OR parents who get a re-entry permit and come back every time just before it expires.
As you can see, time is NOT the definitive factor. If a long absence arises suspicion, DHS will look for evidence surrounding the absence. There are many instances where a long absence might NOT mean abandonment, e.g. having to care for a sick relative for a few months, making a long cruise around the world with intent to return etc. However, merely adhering to time requirements is not enough.
At all times, a PR must demonstrate intent to reside in the US permanently, and any absence, long or short, must be of a temporary nature. That is what PERMANENT residence is.
None of the above may apply to your parents, but I just thought you and others should be aware.
Best wishes.