Incorrectly listed as Flight Sergeant on the VAC site.Confirm if there were other fatalities.
Matthews, Charles Lewis (Flight Lieutenant)
Killed in Flying Accident 1967-April-27
Service
RCAF
Unit
CEPE- Central Experimental & Proving Establishment
Exporto Crede
Base
Rank
Flight Lieutenant
Position
Flight Lieutenant
Service Numbers
130369
Crew or Other Personnel
Hercules 10309
Hercules serial: 10309

CC-130H Hercules
(Source RCAF Web Page)
(Source RCAF Web Page)