Normal Procedures
Pilot's Flight Manual
4-26 Reissued: 16 Jan 2019
4-16. PILOT’S CHECK OF IDLE MIXTURE, IDLE SPEED, AND
(HELICOPTERS WITH FUEL INJECTED ENGINE - HIO-360-G1A)
FUEL BOOST PUMP (cont)
CAU TION
Air craft may ro tate if land ing gear is set on a smooth,
hard sur face and op er a tor does not cor rect for loss of
torque with ped als.
b. Rapidly rotate throttle closed and into full override
position.
c. Read and record engine idle rpm prior to engine
and rotor tachometer needles superimposing.
d. With engine head temperature near 300°F, but not
above, repeat the three preceding steps, without
going into full override (set throttle at normal idle
stop).
NOTE
: The first check (throt tle into full over ride)
should pro duce an idle speed no less than 1400 rpm.
The sec ond check (throt tle at nor mal idle stop) should
pro duce an idle speed no greater than 1600 rpm.
e. If engine idle speed is not within the required
limits, notify the appropriate maintenance personnel
to perform adjustments in accordance with the
Basic HMI.
3. (Helicopters with fuel injected engine - HIO-360-G1A) Perform
a fuel boost pump check.
a. Operate helicopter at idle rpm with fuel boost pump
ON.
b. Turn fuel boost pump OFF while observing engine
tachometer.
c. If a change in engine rpm is observed, ground
helicopter and troubleshoot fuel system.
NOTE
: Any no tice able change in en gine rpm is un ac cept -
able and must be en tered in the He li cop ter Log Book.
SCHWEIZER
Model 269C-1 Helicopter
FAA Approved
CSP book 2..indd 104 8/4/19 12:53 PM
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