SECTION 4
NORMAL PROCEDURES
CESSNA
MODEL 172S
.,
b. Taxi and Landing Light Switches -- ON.
(to provide an initial electrical load on the system):'
c. Engine
RPM --
REDUCE to idle ..
(Minimum alternator output occurs at idle.)
•
d. Master Switch -- ON (with taxi and landing lights switched
on).....
_.
• - .
.
'j.
(The ammeter
shouid
indicate
ine.the negative .dlrection,
showing
that
the
alternator
output
is
beiow' the
load
requirements,
but the battery
is suppiying
cur"rent to the
system.)
,
•
e. Engine
RPM --
INCREASE to approximately 1500
RPM
(as
engine
RPM
increases,
alternator
.output
should
increase to meet the system load requirements).
I. Ammeter and Low Voltage Annunciator -- CHECK
(the' ammeter
should
indicate
in the -positive
direction,
showing
that the alternator
is. supplying
current
and the
Low Voltage Annunciator (VOLTS) should not be lighted).
NOTE
II
the indications, as noied in St~p "d"'and
Step "I",'are
not'
observed,
the electrical
system is not functioning
properly.
Corrective. maintenance
must be performed
to provide lor
proper electrical system ,?peration bef.ore llight.
16.'Navigation
Lights -- ON as required'
17. Avionics Master Switch -- ON.
18. Radios -- ON.
19. Flaps -- RETRACT.
L-14
Revision 4
Содержание Cessna 172S Skyhawk SP
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