Originally Posted by
boresite
Um, by completing a qualified flying instructor's rating?
Neither a FIR or Cert IV in T&A makes you a good instructor. The only good instructors I ever had were the ones who wanted to instruct, for the pleasure of training and teaching new pilots the right skills.
The instructors who got their FIR to build hours from a bare CPL and avoid having to do some real work in NT/WA GA were unfortunately far too easy to pick and nowhere near as easy to avoid. They were also predominately of a much lower standard, both as instructors and pilots.