In virtually all engine-out approach accidents ... by trying to meet very specific ... requirements  [training standards requiring  the upgrading-pilot  to slow to a speed very near a "published"  Vmc]  ... coping with performance deterioration,   asymmetric thrust was added   ... led to  loss of lateral-directional control. 

The insidious factor
is that none of the victims seemed to
recognize how close ... to loss of control,
even upon the verge of losing it,
and the loss occurred
within scant seconds  . . .

Details  from  

C.A.B's Peconic  investigation

Failure - Interactions

Track :     Downwind (NNE),      Base-leg  (WNW)

  while  attempting  left-turn  to  "final"   LoC-I

Yaw x Roll = DIVE!

These  notes  are  In-progress  -  so  scroll down  . . .  you'll get the concepts  . . .

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