Aircraft maintenance is heavily regulated. This was a new plane, and the result of the failure is that all planes of that type have been grounded.
There are plenty of issues caused by corporate greed and lack of regulation as it is, but this isn't one of them.
Incorrect - GMT is a timezone which the UK (and some other countries) observe in winter. In summer, the UK observes BST.
Good explanation here: https://www.timeanddate.com/time/gmt-utc-time.html
It does - the magnetos can be turned off (usually like turning a key in a car), which will immediately stop the engine from firing.
It's not that she doesn't want kids - she's just trying to avoid the big bill.