CESSNA SECTION 2
MODEL 172S NAV III OPERATING LIMITATIONS
GFC 700 AFCS
U.S.
FAA APPROVED
POWERPLANT INSTRUMENT MARKINGS
Powerplant instrument markings and their color code significance are
shown in Figure 2-3. Operation with indications in the red range is
prohibited. Avoid operating with indicators in the yellow range.
POWERPLANT INSTRUMENT MARKINGS
INSTRUMENT
RED LINE
(MIN)
RED ARC
(LWR)
YELLOW
ARC
GREEN ARC
(NORMAL
OPERATING
RANGE)
RED ARC
(UPR)
Tachometer
Sea Level
5000 Feet
10,000 Feet
---- ---- ----
2100 to 2500
2100 to 2600
2100 to 2700
RPM
2700* to 3000
RPM
Cylinder Head
Temperature
---- ---- ---- 200 to 500°F ----
Oil
Temperature
---- ---- ---- 100 to 245°F 245* to 250°F
Oil Pressure ---- 0 to 20 PSI ---- 50 to 90 PSI 115* to 120
PSI
Fuel Quantity 0 (1.5
Gallons
Unusable
Each
Tank)
---- 0 to 5
Gallons
5 to 24
Gallons
----
Fuel Flow ---- ---- ---- 0 to 12 GPH ----
Vacuum
Indicator
---- ---- ---- 4.5 to 5.5
in.hg.
----
*Maximum operating limit is lower end of red arc.
Figure 2-3
172SPHBUS-00
2-7
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