Thread drift, but cannot go without comment:
If you are referring to the Shrike, the Australia only approved overload VFR is closer to 400 kg, almost a 15% increase on the manufacturer's MTOW - despite two catastrophic in-flight failures in Australia in recent years plus a further twenty overseas!!
There is no evidence to suggest that the 2 failures in Australia are related to the increased MTOW. In both Australian accidents the wings failed outboard of the engines - in the accidents o/s relating to the spar issue, the failures were inboard of the engines.
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