Larry Dighera wrote:

While the engine may be able to continue running after ingesting some
water, with an ambient temperature low enough, it wouldn't get fuel if
water in the fuel lines froze. What volume of water is enough to
cause such a frozen plug?

This is just about impossible in the air. Moving water stays liquid at a much
lower temperature than standing water. You are postulating a situation in which
the water in the gas tank is above freezing and the temperature in the fuel
lines is about 0 degrees Fahrenheit. Of course, it's possible for water to get
into the lines on the ground and freeze when the temperature gets below
freezing, but then the aircraft would never start.

George Patterson
The desire for safety stands against every great and noble enterprise.