I would have asked her 1) are you choking? and if she nodded yes I would
have asked 2) can you talk? and if she nodded no then I would have
intervened. OTherwise as long as shes moving air in SOME form or fashion
I would let HER focus on clearing the obstruction and ME focus on
setting down somewhere if it didnt immediately clear.

If intervention were warranted (assuming a front seat passenger), I
would have attempted one or two modified abdominal thrusts (with similar
direction and force as a heimlich). One or two thrusts will not cause a
total departure from controlled flight in my opinion, and it might
provide enough effect to dislodge the obstruction. Thrust or two..
verify the plane is in control.. thrust again.. etc.. if it doesnt clear
within a few moments of thrusting then its unlikely you will clear the
obstruction in the air with lay skills. At that point, its purely a
personal decision what do do next.

Dave, RN, EMTP, PPSEL

JJS wrote:

While flying between Gallup N.M. and Winslow, A.Z., my passenger
pulled out a peppermint candy, handed it to me and retrieved another
for herself. I popped mine in my mouth, took a gulp from my water
bottle and went back to enjoying the view. Shortly thereafter, my
passenger starts gagging. When she had tossed the lozenge in her
mouth we hit a bit of turbulence and the candy tried to enter her
windpipe whole. A look of distress crossed her face as I quickly
realized what had happened. Her involuntary gag reflex went into
overdrive as she struggled to breathe. A feeling of helplessness
crossed over me as I realized we were 35 miles from the nearest
airport and it would be several minutes at best before we could land.
Even if I set the airplane down on I-40 it would be at least 5-6
minutes. That would lead to me risking the lives of others. With no
autopilot and while flying in rough air, an attempt at the Heimlich
maneuver would undoubtedly lead to an out of control aircraft over
mountainous terrain. What would you have done.