CSP–520N–1
MD 520N (500N) ROTORCRAFT FLIGHT MANUAL
Emergency and
Malfunction Procedures
R
Revision 2
3–18
FAA Approved
3–11. FLIGHT CONTROL MALFUNCTIONS
ANTI−TORQUE FAILURE
Different types of failure require slightly different techniques for optimum suc
cess in recovery. Therefore, it is not possible to provide a standardized solution
for an anti−torque emergency.
The nose of the aircraft will turn right with power application. The nose of the
aircraft will turn left with power reduction.
Conditions:
Complete loss of thrust − forward flight
This involves a break in the fan drive system (ie., a broken drive shaft)
that causes the fan to stop turning, resulting in a complete loss of fan
thrust. Directional control becomes dependant on airspeed and power
setting.
Indications:
Failure is normally indicated by an uncontrollable yawing to the right.
Procedures:
F
Directional control becomes dependant on airspeed, power setting, and to
some extent, pedal position. Good directional control can be maintained
with loss of NOTAR fan thrust by adjusting airspeed and power for level
flight between 60 and 100 KIAS.
Do not attempt an autorotation from forward flight unless an actual
engine failure occurs.
F
Perform a shallow approach and running landing to a hard surface or oth
er suitable area. Touchdowns made into the wind between 20−30 KIAS,
will provide good directional control at reduced power settings.
Do not attempt flight below 20 knots.
CAUTION
CAUTION
