Viperdoc wrote:
Besides, being carbureted, a 150 will quit after only a few seconds
inverted. The NTSB should also look at the quality and quantity of the
simulated IMC time during his training.



The basic instrument flight instruction part of PP training is
really not sufficient, nor is it intended to be for sustained
flight into IMC. Especially when at the same time trying to
communicate with ATC, manage NAV radios and so forth.... that
is what the instrument rating trains you to do.