The Swearingen-TEB incident: control issues with twins

Even better rule...don't try to go around on one engine. Put it on a
taxiway, on the grass, whatever, but don't try to go around on one. IMHO it
is bad training practice to even suggest to a MEL student that waving off is
a practical alternative.

Bob Gardner

"Cockpit Colin" wrote in message
...
I'm a ASEL primary student. What's the skinny on multi-engine control
issues
when one engine fails on approach?

As you would expect, there is a tendency for the aircraft to yaw towards
the
failed engine which then creates a roll in the same direction (secondary
effect of yaw). It's countered with rudder - but the amount required
depends
on how much power the engine is producing, and how much airspeed you have.

Multi-engine aircraft have a minimum asymetric control speed (Vmca) (Vmc
in
some parts) - below this speed you won't have sufficient rudder authority
to
stop the yaw/roll unless you reduce power on the good engine -
unfortunately
it's all too common for pilots of twins to get low and slow on one engine,
and then go below Vmca whilst trying to go around on 1 engine - at which
point the aircraft slowly rolls on it's back and everyone dies.

So - the lessons are ...

1. Don't get low and slow on 1 engine, and

2. If you ABSOLUTLELY have to go around on 1 engine, make the decision as
early as possible.

3. Practice these things with an instructor on a regular basis (every 90
days is good)

As previously noted by Bob, on the approach it's often so subtle you don't
even know one has failed.