Accident investigations results from the US Air Boeing 737
accident at Pittsburg, PA; a similar accident at Colorado Springs, CO, and
several near-upsets involving Boeing 737’s have suggested that the cause may be
a sudden, uncommanded, full deflection of the rudder which causes the aircraft
to become uncontrollable.
Suggested remedies have included:
of the rudder to a two panel configuration so that full deflection of either
panel could not provide enough control input to cause the aircraft to go out of
Redesign of the
rudder Power Control Unit to preclude full-scale rudder deflection at a certain
critical airspeed and flap configurations
Modification of the
Operators (Pilot’s) Flight Manual to avoid changing configuration or operating
in certain critical airspeed regimes
Which of these
suggestions would be most effective and reliable IF the Boeing 737were still in
the Design phase of its life cycle?
What issues might
limit the effectiveness/desirability of this approach as a total solution?