CSP-520N-1
Normal Procedures
MD 520N (500N) ROTORCRAFT FLIGHT MANUAL
R
Original
4-25
FAA Approved
4-13. ENGINE/AIRCRAFT SHUTDOWN
Care should be taken when rotating the twistgrip to the ground
idle position and from ground idle to the cutoff position if the
helicopter is parked on a icy or slippery surface (helicopter may
spin in direction of main rotor blade rotation).
NOTE
:
Shut down the engine before exiting the helicopter unless safety or operational
considerations dictate otherwise.
F
Pilot’s twistgrip
PERFORM
DECELERATION
CHECK
NOTE
:
To insure proper engine performance, perform the deceleration check during
shut down after the last flight of the day (see paragraph 4-15).
F
Twistgrip to GROUND IDLE detent−hold for 2 minutes
SET
F
Collective stick
FULL DOWN
FRICTION ON
F
Cyclic stick (neutral position −approximately
1/3 from full aft)
TRIM TO NEUTRAL
APPLY FRICTION
F
All unnecessary bleed air and electrical
equipment
OFF
F
Pedals
NEUTRAL
F
Twistgrip from GROUND IDLE to CUTOFF position
SET
NOTE
:
Immediately after closing twistgrip to the CUTOFF position, a dual tachometer
needle split should occur with N
R
lagging behind N
2
. If no needle split occurs,
check overrunning clutch for proper operation per HMI.
To ensure throttle cutoff, hold twistgrip in cutoff position until N
1
decelerates to
zero and TOT is stabilized. Check for TOT decrease.
An afterfire (recognized by a rapid increase in TOT) can occur during
shutdown if fuel cutoff is not complete. If an afterfire occurs,
immediately engage the starter and motor the engine to minimize
the temperature encountered. To extinguish the fire, continue
motoring the engine with the twistgrip in the CUTOFF position and
pull out the fuel shutoff valve. Observe TOT limits.
CAUTION
CAUTION
