PEI_3721,
The most important concern regarding sideslip is fuel tank unporting and engine upsets[at extreme sideslip autoignition may help,...but the air entering,... may be so low energy that it wont matter,...of course as you said it depends on the spsecific AFM limits,...as far as aerodynamic issues these are most related to instrument indications [if uncorrected] etc...not strength
but attaining the practical slip limit on a jet to me seems...
from a prior post relating to 'control reversal'
there is no more hazardous a maneuver than sudden control reversals in an airplane ---the certifcation requirements do not even consider that--as resonance may develop and quickly result in a catastrophic failure even on a Pitts special or an extra or an f-22 or a cub or a 737---and even at or below Va ---
PA