It does seem that this is some false information. According to a recent article from 17OCT on their website they plan to augment their fleet by three planes. Another 733 is due this year and they plan to add two 763 in 2012.
If there would have been an order or the intent to take up used Q400s I think they would have added this in this article. Also, no word about this on South American forums.
AeroSur's article (in Spanish):
|Quoting g500 (Reply 1):|
I believe their fleet looks something like this:
1 Boeing B747-400
1 Boeing B767-200ER
4 Boeing B737-400/300
4 Boeing B737-200
5 Boeing B727-200
According to their in-flight magazine and my observations:
2x 722 (only one active at the moment)
Pictures of their fleet page in their in-flight magazine can be seen here:
Of Buckets & 3-Holed Workhorses:5L 732, 722 To LPB (by volvair Nov 8 2011 in Trip Reports)
[Edited 2011-11-23 18:34:01]