CSP-HE/HS-1
Optional Equipment
Automatic Engine Reignition
ROTORCRAFT FLIGHT MANUAL
MD 500
(Models 369HE/HS/HM
)
Revision 6
9-55
FAA Approved
speed and power being used. Reignition has been satisfactorily demon−
strated at idle power, in autorotation, and takeoff power in a climb.
LATER, UNMODIFIED SYSTEM (250−C18 or C20):
Before engine start:
F
Electrical power and key switch
ON
.
F
PNL LT
and
ENG OUT
circuit breakers
IN
.
F
Place arming switch in the
ARM
position.
ARMED
light and
RE−IGN
indicators illuminate.
F
Press
RE−IGN
light; light should go out. Press again;
RE−IGN
light
stays out and
ARMED
light stays on.
F
Set arming switch to
OFF
.
Engine run−up:
F
Set N
2
above 98
±
1 percent.
F
Move arming switch to
ARM
. Green
ARMED
light should illuminate and
RE−IGN
indicator should be out.
F
Reduce RPM to below 98 percent. The
RE−IGN
light should illuminate
indicating that the ignition igniter has been energized.
F
If it is desired to extinguish the
RE−IGN
light, press and release
RE−
IGN
light. Light should go out.
F
If continued operation of the system is not desired, disarm the system.
Arm the system any time falling or blowing snow is encountered.
Each time that the engine failure low/rotor rpm warning system is activated
(main rotor speeds below 98 percent N
2
or N
1
below 55 percent) the
RE−IGN
indicator light will illuminate, indicating that the ignition igniter has been en−
ergized.
NOTE
: RE-IGN
indicator light will stay on until manually reset. The reignition system will
continue to function normally whether reset or not.
If the N
R
or N
1
tach generator fails, the
RE-IGN
indicator will light and the igniter
will be energized until the engine is shut down or the reignition system is
disarmed (
ENG OUT
circuit breaker pulled).
Failure or deactivation of the engine failure/low rotor rpm warning system,
renders the reignition system inoperative. Under certain failure conditions, the
ARMED
light may stay on.
