Back in 1972 Guy Bernier and Hubert Laurin decided to set up an aerial spraying business. Soon after, though, they found out that not only piloting the plane was important, but so was their upkeep. As time went by, their reputation as skilled mechanics grew in the aeronautical field. When the spraying season was over, they repaired aircrafts and seaplanes for private and commercial companies.

This soon became the full-time endeavour of Aviation BL inc.