Hi GShevel,
I just spotted your post. I don't have specific information on your G-Grandfather, however you can access the personnel records for all Canadian forces personnel at:
Personnel Records Unit, RSD,
The National Archives,
395 Wellington St, Ottawa, ON, K1A ON3
It may take a while to get an answer, they are kind of slow at times.
Also, the Directorate of History can be reached by mail at:
Directorate of History,
National Defence Headquarters,
MGen George R Pearkes Bldg,
Ottawa, ON,
Canada K1A OK2
Unless of course he was in the RFC (as you surmise), in which case you have to contact the British archives, try the following site:
http://www.nationalarchives.gov.uk/c...afletID=60&j=1