SECTION 4 CESSNA
NORMAL PROCEDURES MODEL T182T NAV III
GFC 700 AFCS
U.S.
BEFORE TAKEOFF
WARM UP
If the engine idles (approximately 650 RPM) and accelerates smoothly,
the engine is warm enough for takeoff. Takeoff with turbocharged
engines should not be started if indicated lubricating oil pressure, due
to cold temperature, is above maximum. Excessive oil pressure can
cause the turbocharger control system to exceed or overboost
allowable manifold pressure and result in engine damage. Since the
engine is closely cowled for efficient in-flight engine cooling, the cowl
flaps should be open and the airplane pointed into the wind to avoid
overheating during prolonged engine operation on the ground. Long
periods of idling may cause fouled spark plugs.
MAGNETO CHECK
The magneto check must be made at 1800 RPM. Turn the
MAGNETOS switch from the BOTH position to the R position. Note the
new RPM, then turn the MAGNETOS switch back to the BOTH position
to clear the spark plugs. Turn the MAGNETOS switch to the L position,
note the new RPM, then turn the switch back to the BOTH position.
RPM decrease should not be more than 175 RPM on either magneto or
be greater than 50 RPM differential between magnetos. If there is a
doubt concerning operation of the ignition system, RPM checks at
higher engine speeds will usually confirm whether a deficiency exists.
No RPM drop may indicate a faulty ground to one magneto or magneto
timing set in advance of the angle specified.
ALTERNATOR CHECK
Make sure that both the alternator and alternator control unit are
operating properly before night or instrument flight, or flights where
electrical power is essential. Check the electrical system during the
MAGNETO check (1800 RPM) by setting all electrical equipment
required for the flight to the ON position. When the alternator and
alternator control unit are both operating properly, the ammeters will
show zero or positive current (amps), the voltmeters should show
between 27 to 29 volts, and no electrical system annunciations will
appear. Reduce the electrical load before reducing engine speed so the
battery will not discharge while the engine is at idle.
(Continued Next Page)
T182TPHBUS-00
4-30
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