For technicians, it used to be that the time between when people came in the door to when they were certified to sign for maintenance on an airplane could take three and a half to four years because of the course length and the apprenticeship period, and then they were certified to do the business without someone looking over their shoulder every five minutes.
Autrefois, il nous fallait, en raison de la durée des cours et de la période d'apprentissage, trois ans et demi à quatre ans pour former un technicien capable d'assurer la maintenance d'un avion sans avoir à être constamment surveillé.