sleazystar
With great respect, the Asiana crash at SFO is not an example of inexperienced pilots or PTF.
The PF had almost 10,000 hrs (almost 4000 PIC).
The FO/Instructor had more than 12,000 hrs (more than 9,000 PIC).
The Observer/relief FO had more than 4,500 hrs (almost 1500 PIC.)
Causal factors included (the perils of?) increased automation and consequent lack of current hand-flying experience.
Please do not misinterpret the above as supporting PTF.