Investigators are combing through the wreckage of Wednesday's plane crash north of Kenora.

Two people from the Transportation Safety Board’s Winnipeg office will spend a second day at the crash site at Trout Lake, said spokesperson Peter Hildebrand. So far they have made some observations, but no conclusions.

“It's a relatively smallish lake in a way that — if you take off you are not likely going to have much room to land — if you need to land for some reason,” he said

Hildebrand said the investigators are looking through the aircraft systems and structure to see what they might need to examine more closely. Interviews with cottagers on the lake and one of the passengers on the aircraft have not pinpointed what led to the accident.

Wreckage to remain on site for now

For now the aircraft will remain at the crash site, as Transportation Safety Board officials are not in a hurry to look into getting the wreckage airlifted out.

"We have to be a little careful at this point as we are not able to talk to the owner at this point,” Hildebrand said.

“Normally we co-ordinate with the owner as to [how to get it out] ... we're not just gonna go in willy-nilly and get a helicopter to lift it out, for example.”

He noted the plane is badly damaged and trees are obstructing access to the aircraft.

The 78-year-old pilot Art Martin and 62-year-old passenger Linda May of Cloquet, MN suffered serious injuries in the crash. They remain in hospital.