checklist - ERAU ETA - Embry-Riddle Aeronautical University

PA-28R-201 SOP 17
LEANING PROCEDURES
The following leaning procedures, developed for use during ground, climb,
cruise, descent, and landing operations, are employed to aid in
preventative maintenance and flight safety operations.
With respect to the engine operation, utilization and adherence to these
procedures are important, especially during high power settings and rich
mixture settings, to prolong the engine life and to ensure flight safety.
GROUND
Confirm that the Mixture Control is in the Full Forward (Full Rich)
position.
Lean the mixture by slowly moving the Mixture Control back to the
stop.
TAKEOFF (High elevation airports only)
At high elevation airports (at or above 3000’ MSL), prior to takeoff,
lean the mixture only enough to obtain smooth engine operation. Use
care not to overheat the engine.
CLIMB
Below 3000’ pressure altitude, leave the Mixture Control in the Full
Forward (Full Rich) position.
Above 3000’ pressure altitude, lean the mixture only enough to obtain
smooth engine operation.
CRUISE (at all altitudes)
Local Flight:
Set cruise power, then slowly move the Mixture Control back until a
until a slight increase of airspeed is noted or engine operation
becomes rough.
Next, slowly move the Mixture Control forward to obtain smooth
engine operation.
Cross-Country Flight:
Set cruise power, then lean the mixture using the Exhaust Gas
Temperature (EGT) gauge to achieve engine operation at 100°F to
the “rich” side of peak (best power).
Rev 06 © Embry-Riddle Aeronautical University Revised 07-01-2012