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In the old days Tech Services was the place the Line and Hangar Engineers retired to when their knees gave in and they could no longer clamber in and out of freight bays or they no longer wanted to (or couldn't) work shifts.
Many a cold wet winters night on the ramp we envied our Tech Service Colleagues thier comfy swivel chairs, warm cosy offices full of totty, sipping endless cups of tea surfing the net and drawing up the occasional mod.
Come the summer they envy our ramp tan
and outdoor lifestyle coming and going as we please (alledgeldy) spending our days in the fresh air tinkering with aeroplanes and chattting up hosties
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^^^^^ excellent! The man speaks the truth!
Many places expect or would like you to be B1 or B2, but it's not always necessary, I'm just A licenced but been doing it for years. Good luck, keep trying.
Drawing up mods and in service fleet support are not the same thing though, maybe that's why no responses as yet, depends what they are after.