Tolerances for aircraft dimensions can be surprisingly generous.
I used to do heavy maintenance on C-130’s and before and after the input a full symmetry check would be carried out.
For long distances like wing tips, the tolerances were over an inch, but with less for smaller parts of the aircraft.
The tolerances were more for position, than say span, more like distance from a centre line.
Only if the tolerances were way out would an investigation begin, anything near the limits were entered in the aircraft log book, and were usually rigged out on airtest.
One aircraft for instance, had a twist in the fuselage from when it had plugs fitted and was stretched, this meant you couldn’t get it to fly straight with the maximum allowed 4 degrees of adjustment on the rudder tab, so an entry was put in the logbook that it was allowed to have 5 degrees of rudder tab to fly straight.
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