SECTION 4 CESSNA
NORMAL PROCEDURES MODEL T182T NAV III
GFC 700 AFCS
U.S.
CRUISE (Continued)
LEANING USING TURBINE INLET TEMPERATURE (T.I.T.)
The cruise performance data in this POH is based on the
recommended lean mixture setting which can be set using the lean
assist system (this can only be used if Turbine Inlet Temperature (T.I.T.)
reaches peak before lower end of red arc) or the T.I.T. indicator at
power settings of 88% MCP and less.
Exhaust gas T.I.T. is displayed on the EIS ENGINE and LEAN pages.
The ENGINE page has a horizontal scale with a temperature indicator
(inverted triangle) and is labeled T.I.T. The LEAN page has the same
indicator but is labeled T.I.T. °F along with a digital value. Both
indicators show the exhaust gas temperature at the inlet of the
turbocharger turbine in degrees Fahrenheit.
LEANING WITH A T.I.T. INDICATOR IS PERMITTED
ONLY WHEN MANIFOLD PRESSURE AND RPM ARE
WITHIN THE GREEN ARC RANGES.
To use the lean assist system, push the ENGINE, LEAN and ASSIST
softkeys. The symbol
ΔPEAK °F will display below the T.I.T. indicator.
Recommended lean operation is at 50°F rich of peak T.I.T. The T.I.T. is
at peak temperature when
ΔPEAK °F shows a value of 0. When ΔPEAK
°F shows a negative value (-), T.I.T. is on the rich or lean side of peak.
To lean the mixture, slowly rotate the mixture control counterclockwise
while monitoring both the T.I.T. indicator and the
ΔPEAK °F value. Do
not continue to lean the mixture if T.I.T. reaches the red line. When T.I.T.
reaches peak (
ΔPEAK °F 0), monitor ΔPEAK °F and FFLOW GPH and
enrichen the mixture by slowly rotating the mixture control clockwise
until T.I.T. goes back to 50°F rich of peak (ΔPEAK °F -50°F). For best
power or best economy, set T.I.T. based on T.I.T. Table, Figure 4-4.
(Continued Next Page)
T182TPHBUS-01
4-36
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