WINNIPEG - The Transportation Safety Board is still trying to determine the cause of a plane crash in northern Manitoba that killed one person and left seven others injured.

Regional manager Peter Hildebrand says investigators are still piecing together what happened before the small Cessna 208B went down in Snow Lake Nov. 18.

Hildebrand says there is already one conclusion that can be drawn from the crash -- that more safety regulations are needed for small aircraft.

The safety board is reiterating a call for the federal government to require flight data recorders and cockpit voice recorders on small planes, as it already does on larger ones.

Hildebrand says the so-called air taxis -- planes with fewer than nine seats -- should also be required to have safety management systems in place as larger planes do.

The Snow Lake plane was carrying passengers who worked for Dumas Mine Contracting when it went down shortly after takeoff, killing the pilot, 40-year-old Mark Gogal.