Plane went down off Brazil on July 1 , killing all 228 aboard . However , data recorders stop broadcasting after 10 days . Finding the recorders is of `` capital importance , '' and `` no effort must be spared in achieving this end , '' Air France has said . Investigators planned to keep searching for 30 additional days . French oceanographic institute will conduct new searches .
Plane went down off Brazil on July 1 , killing all 228 aboard . However , data recorders stop broadcasting after 10 days . Investigators planned to keep searching for 30 additional days . French oceanographic institute will conduct new searches .