Optional Equipment
Automatic Engine Reignition
ROTORCRAFT FLIGHT MANUAL
MD 500
(Models 369HE/HS/HM
)
CSP-HE/HS-1
Revision 6
9-56
FAA Approved
Pulling out the ENG OUT circuit breaker will disarm the Auto
Reignition system.
Following any activation of reignition system caused by flameout from snow,
ice or water ingestion, inspect engine in accordance with the appropriate Alli−
son 250 Series Operation and Maintenance Manual.
Yawing of the helicopter may or may not follow an engine flameout and re−
ignition sequence. The magnitude of the yaw will depend on forward speed
and power being used.
LATER, MODIFIED 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 and hold test switch in the
TEST
position.
ARMED
and
RE−IGN
indicators illuminate and the sound of the igniter firing is heard.
F
Release test switch. Only the
RE−IGN
light should remain illuminated
after the test switch is released.
F
Press
RE−IGN
light to reset the light.
Engine Run−up:
NOTE
:
The
RE-IGN
light may illuminate when the
XMSN OIL PRESS
light goes out.
After flight rpm is established, press the
RE-IGN
light to reset (extinguish) the
light.
Whenever there is transmission oil pressure, the
ARMED
light should be on.
F
Set N
2
above 98
±
1 percent.
RE−IGN
light should be
OFF
.
F
Reduce RPM to below 98 percent. The
RE−IGN
light should illuminate
indicating that the ignition igniter has been energized.
F
Set N
2
to 103 percent.
F
To extinguish the
RE−IGN
light, press and release
RE−IGN
light. Light
should go out.
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.
CAUTION
