4-18 P/N 13772-003
Section 4 Cirrus Design
Normal Procedures SR22T
Full Power Climb: Rich of Peak Technique
1. Oxygen................................................................... AS REQUIRED
2. Power Lever .......................................................FULL FORWARD
3. Mixture ....................................Maintain Fuel Flow in GREEN ARC
4. Flaps ................................................................................ Verify UP
5. Airspeed...........................................................................120 KIAS
6. Fuel Pump.......................................................................... BOOST
7. Fuel Flow........................................................................ MONITOR
8. Engine Parameters ........................................................ MONITOR
Amplification
The fuel pump should be in the BOOST position during takeoff and for
climb as required for vapor suppression with hot or warm fuel
For maximum rate of climb, use the best rate-of-climb speeds shown
in the rate-of-climb chart in Section 5. If an obstruction dictates the use
of a steep climb angle, the best angle-of-climb speed should be used.
Climbs at speeds lower than the best rate-of-climb speed should be of
short duration to avoid engine-cooling problems.
During full power, full rich climbs, fuel flow should be maintained in the
green arc. If full rich fuel flow drops below the green range, this will
usually be corrected by use of BOOST (below 18,000 feet) or HIGH
BOOST/PRIME (above 18,000 feet). If cylinder head temperatures
consistently exceed 420ºF, use higher airspeeds for better cooling.
To avoid excessive CHTs, verify fuel pump is in the BOOST position.
For increased engine life do not allow CHTs to continuously exceed
420ºF. If any CHT consistently exceeds 420ºF during the climb, lower
the nose and increase airspeed as required to maintain the hottest
CHT at or below 420ºF whenever practical. Intermittent CHTs up to
420ºF are not a concern. Maximum CHT value remains 460 ºF.
Use of High Boost / Prime Fuel Pump Setting
Under some extreme environmental conditions, the use of the fuel
pump in the HIGH BOOST/PRIME position may be required in flight
above 18,000 feet to adequately suppress vapor formation. This
condition is most likely to occur during climbs above 18,000 feet on hot
days with warm or hot fuel in the tanks. Above 18,000 feet, if there is a
loss of fuel flow or vapor locking is suspected, turn the fuel pump to
HIGH BOOST /PRIME position and reset the mixture as required to
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