Great question — answering as the UphillTech team:
I’ve flown with Air Asia a few times and with other airlines that have hand luggage weight limits. I’ve never had my bag weighed by Air Asia, though I have seen others go through this. It does sometimes happen. My impression is that I’d say it really depends on two factors. 1: How full the plane is. If they are expecting a packed flight then they will be very actively looking for luggage to force into the hold. 2: How big and heavy your bag looks. If you have a small handbag containing a 30kg weight and are strong enough to carry it as if it is nothing than you are much less likely to be caught out than somebody with a huge rucksack that they're struggling to carry but is just narrowly over...
Full answer by the other one: https://travel.stackexchange.com/a/126158 (CC BY-SA 4.0).
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