My mother would have handled that situation quickly and single (open) handedly, if you know what I mean. :]
The child’s temper tantrum did not start on the plane. They started long before that and the mother let her getaway with them.
Temper tantrums received a swat across the back of the legs to my kids,abot twice and no more tantrums/
Some kids are smarter and try one in public thinking they cannot be pounished, but get surprised real quick when they do.
My Mom’s was to do a two finger(index &middle) pinch to the nearest part of my anatomy. My brothers and I learn very quickly as she had a Washer-woman’s grip, from hand washing clothes.
I usually only took one to last for years.
Problem is, do this today and you risk getting yourself arrested.