A340 Wallowing

From:         rna@gsb-mailhost.stanford.edu (Robert Ashcroft)
Organization: Stanford University, CA 94305, USA
Date:         15 Jun 95 01:13:59 
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I recently flew SFO-CDG-SFO on an A340-300.  In both directions the plane
exhibited a rather unnerving episode of "wallowing".  Without warning,
and for no perceptible reason, the plane started banking first in one
direction, then the other, back and forth.  The amplitude of the banks
increased for a while until somehow the plane ended up back in level
flight.  Very disconcerting.

So far as I remember, we were not in turbulence when this occurred.

Comments?  So far as I can remember, this is the first time I've
ever had this experience.