Normal Procedures
Pilot’s Flight Manual
4-22
Reissued
16 Jan 2019
4-14.
ENGINE COOLING SHUTDOWN (cont)
Set clutch control switch in RELEASE position (guard open) and
maintain throttle against stop until tachometer indicates rotor
disengagement.
CAUTION
DAMAGE TO ROTOR BLADES AND TAILBOOM MAY
RESULT IF COLLECTIVE PITCH IS USED TO SLOW ROTOR.
Set mixture control in IDLE CUTOFF position.
Set magneto switch in OFF position.
Set alternator switch in OFF position.
Set battery switch in OFF position.
Set all remaining switches in OFF position.
Set fuel shutoff valve in CLOSED position.
4-15. PILOT’S CHECK OF IDLE MIXTURE, IDLE SPEED, AND
FUEL BOOST PUMP
NOTE: This check of idle mixture and idle speed shall be accom
-
plished at the end of the last flight each day, prior to engine shut
down. In the event that the idle mixture check was not accom-
plished and recorded, the procedure must be accomplished prior to
first flight of the day.
Accomplish this idle mixture check by first hovering the aircraft until
normal in-flight operating temperatures of cylinder heads and engine
oil are achieved. Once normal operating temperatures are achieved,
perform the idle mixture check as follows:
Land from a hover with engine cylinder head temperature and
oil temperature as near to in-flight conditions as possible, friction
on the collective and cyclic controls and engine speed at operat-
ional rpm.
Ensure MIXTURE is set to FULL RICH.
CAUTION
AIRCRAFT MAY ROTATE IF LANDING GEAR IS SET ON A
SMOOTH, HARD SURFACE AND OPERATOR DOES NOT
CORRECT FOR LOSS OF TORQUE WITH PEDALS.
Rapidly rotate throttle to CLOSED position. (Set at normal idle
stop, do not over ride.)
If engine quits, notify appropriate maintenance personnel to make
adjustments.
This Document contains technical data subject to EAR. See WARNING and classifications on first page.
SCHWEIZER
Model 269C Helicopter
FAA Approved
CSP Book 1 CSP-C-1.indd 110
8/4/19 12:45 PM
