CSP-HE/HS-1
Emergency and
Malfunction Procedures
ROTORCRAFT FLIGHT MANUAL
MD 500
(Models 369HE/HS/HM
)
Revision 6
3-19
FAA Approved
3-1 1. FLIGHT CONTROL MALFUNCTIONS
ANTI−TORQUE FAILURE
Different types of failure may require slightly different techniques for optimum
success in recovery. Therefore, it is not possible to provide a standardized solu−
tion 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 drive system (ie., a broken drive shaft) that
causes the tail rotor to stop turning, resulting in a complete loss of
thrust. Directional control becomes dependant on airspeed and power
setting.
Indications:
Failure is normally indicated by an uncontrollable (by pedal) yawing to the
right.
Procedures:
F
Reduce power by lowering collective.
F
Adjust airspeed to 50 − 60 knots.
F
Use left lateral cyclic in combination with collective pitch to limit left
sideslip to a reasonable angle.
F
If conditions permit, place the twistgrip in the ground idle position once a
landing area is selected and perform a normal autorotation. Plan to touch
down with little or no forward speed.
Conditions:
Complete loss of thrust − at a hover
Indications:
Failure is normally indicated by an uncommanded right turn.
Procedures:
Place the twistgrip in the ground idle position and perform a hovering
autorotation.
When hovering at altitudes within the cross-hatched areas
depicted on the Height Velocity Diagram (Ref. Section V), reduce
altitude to 8 feet or less prior to placing the twistgrip in the ground
idle position and performing a hovering autorotation.
WARNING
