Piper CHEROKEE D - Page 33

CHEROKEE "D" SECTION Ill
consumption significantly, especially at higher altitudes. The
mixture should be leaned during cruising operation above 5000
feet altitude and at pilot's discretion at lower altitudes when
75% power or less is being used. If any doubt exists as to the
amount of power being used, the mixture should be in the FULL
RICH position for all operations under 5000 feet.
To lean the mixture, pull the mixture control until the engine
becomes rough, indicating that the lean mixture limit has been
reached in the leaner cylinders. Then enrich the mixture by
pushing the control towards the instrument panel until engine
operation becomes smooth. The fuel flow meter will give a close
approximation of the fuel being consumed.
If the airplane is equipped with the optional exhaust gas
temperature (EGT) gauge, a more accurate means of leaning is
available to the pilot. For best power mixture, lean the mixture
until the peak EGT is reached, then enrich the mixture until the
temperature drops a minimum of 25 oF. For best economy mixture,
lean until the peak EGT is reached and continue to lean until
the temperature drops a minimum of 25 oF. Do not lean above 75%
power.
In order
to keep the airplane in best lateral trim during
cruising flight, the fuel should be used alternately from each
tank. It is recommended that one tank be used for one hour after
take-off, then the other tank be used for two hours, then return
to the first tank, which will have approximately one and one half
hours of fuel remaining if the tanks were full at take-off. The
second tank will contain approximately one half hour of fuel. Do
not run tanks completely dry in flight.
APPROACH AND LANDING
Before landing check list:
1. Fuel - on proper tank
2. Electric fuel pump - ON
3. Mixture - set
730130
4. Flaps - set (115 MPH MAX)
5. Seat belts/shoulder harness-
fastened
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