For a hangar Unlicensed Mech/Fitter, the average salary depending on it being GA or commercial will be in the region of £17,000 to £23,000. Shift allowance may alter slightly. Then on gaining your B licence it could be once again depending if it's GA or commercial be from £35,000 up to £52,000. You will find line maintenance pays slightly higher. But the £52,000 is going on having multiple types and a shift premium.