If you do A levels and then don't do a degree then the A levels on their own are not particulary useful.
Not useful advice.
We need to know if you are an academic or technical person - that should advise what you do, as if you are not technical, then working on aircraft could be quite dull - it is not the same as flying them! And on the other hand, if you are not academic, don't waste time doing A-Levels.
More info required...what are your GCSE predictions?