Cub Crafters CC18-180 Pilot Operating Handbook page 95

CUB CRAFTERS
CC18-180
In very cold weather conditions, it may be advisable to
use the pitot heat.
4.4.3 FLIGHT
4.4.3.1 Before Takeoff
When the run-up area is reached, set the parking brake.
Perform the magneto check at 1700 RPM, as follows:
 Switch the left magneto off and note the RPM.
Switch it back on.
 Switch the right magneto off, noting the RPM and
turn it back on.
The RPM drop should not exceed 175 RPM on either
magneto or show greater than a 50 RPM difference
between magnetos. The engine should run smoothly on
either magneto. If there is no drop in RPM, there may be
a fault in the system and it should be checked. Do not run
the engine on one magneto for longer than 10 seconds. If
both magnetos are switched off while the engine is
running, do not turn them back on. Cut the mixture and
re-start the engine. If the magnetos are turned back on
while the engine is running, damage may be done to the
exhaust system and the engine should be inspected prior
to flight.
Apply the carburetor heat to be sure that it is operating.
You will note a drop of about 75 RPM when it is selected.
This will also clear any ice that may have formed during
taxiing. Bear in mind that when the carburetor heat is
selected, unfiltered air is entering the engine, and hence,
its use on the ground should be kept to a minimum.
The presence of ice may be recognized by the fact that
the engine may momentarily run roughly when the
carburetor heat is applied. This may be followed by an
Issued: 05/31/05
Date of Revision: 11/20/12
NORMAL PROCEDURES
REPORT TC10000AFM
Page Number: 4-21
SECTION 4