Yes..
MRO techs can make 50K.. but only as Connies!!
A basic MRO Tech, not classed as a supervisor will earn considerably less than 50K. In fact in the worst paying places almost half!.. That level of pay is what a "C" Cert will get.
Your pay will depend on what you have got in the way of types and what type of shift you work in both sides.
However, in your stage of life, this sort of info is irrelevent (as it is for me as I'm still a mechanic BTW!)
Mechs pay is around £11 PH for permies and for Connies is 13 to 18 in the UK (depending on company rates and what they want!). Maintenance workers is less and appos get peanuts..