Lemurian -
The Toronto accident was pilot error. The F/O actuated the spoilers 60' above ground on a DC-8.....strickly a NO, NO!
Lake Pontchartrain was an apparent failure of the PTC.
And, as I said, I don't have the info on the Moscow accident.
I won't discuss the MD82, because I know nothing about the DC-9 series A/C.
And as to:
"Are you a bit dishonest ? "
Would you care to elaborate on that remark?