CESSNA
MODELTR182
SECTION4
NORMALPROCEDURES
Taxiing over loose gravel or cinders should be done at low engine
speed to avoid abrasion and stone damage to the propeller tips.
BEFORE TAKEOFF
WARM-UP
Since the engine is closely cowled for efficient in-flight cooling,
precautions should be taken to avoid overheating on the ground. Full
power checks onthe ground are not recommended unless the pilot has good
reason to suspect that the engine is not turning up properly.
MAGNETO CHECK
The magneto check should be made at 1700RPM as follows. Move
ignition switch first to Rposition and note RPM.Next move switch back to
BOTHto clear the other set of plugs. Then move switch to the L position,
note RPMand return the switch to the BOTHposition. RPMdrop should not
exceed 175RPMon either magneto or show greater than 50RPMdifferen-
tial between magnetos. If there is a doubt concerning operation of the
ignition system, RPMchecks at higher engine speeds will usually confirm
whether a deficiency exists.
An absence of RPM drop may be an indication of faulty grounding
of
one side of the ignition system or should be cause for suspicion that the
magneto timing is set in advance of the setting specified.
ALTERNATOR CHECK
Prior to flights where verification ofproper alternator and alternator
control unit operation is essential (such as night or instrument flights), a
positive verification can be made by loading the electrical system
momentarily (3 to 5 seconds) with the landing lights during the engine
runup (1700RPM). The ammeter will remain within a needle width of the
initial reading
if
the alternator and alternator control unit are operating
properly.
TAKEOFF
POWER CHECK
It is important to check takeoff power early in the takeoff run. Full
throttle will not be necessary to maintain the maximum rated manifold
pressure. Any sign ofrough engine operation or sluggish engine accelera-
tion is good cause for discontinuing the takeoff.
1 October 1978
4-15
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