CIRRUS SR20 CORE MAIN EXAMINATION
QUESTIONS AND ANSWERS SURE A+
✔✔Pitot tube blockage - ✔✔The only instrument affected is the airspeed indicator.
■ Ram air inlet clogged and drain hole open? Airspeed drops to zero.
■ Both air inlet and drain hole are clogged? The airspeed indicator will act as an
altimeter, and will no longer be reliable.
■ When suspecting a pitot blockage, consider the use of pitot heat to melt ice that may
have formed in or on the pitot tube.
✔✔One static source blocked always results in? - ✔✔Altimeter/ASI/VSI: Inaccurate
readings while sideslipping; very sensitive in turbulence
✔✔Both static sources blocked? - ✔✔Altimeter: Doesn't change with altitude; if blocked
before takeoff, indicate field elevation
ASI: Decreases during climb and increases during descent
VSI: Indicates the last vertical speed before becoming blocked
✔✔All static and pitot sources blocked - ✔✔Altimeter/ASI/VSI: Indication remains
constant regardless of actual changes
✔✔Oxygen System - ✔✔No oxygen system in cirrus SR20
, ✔✔Deicing/Anti icing - ✔✔Cirrus SR20 only has pitot heater and deicing/anti icing
measurement.
✔✔Pitot Static System - ✔✔Altimeter, vertical speed indicator, airspeed indicator (ram
air)
✔✔Environmental System: Heating - ✔✔Heat exchange compressor (surrounds the
exhaust mufflers) + ram air -> the mixing chamber -> cabin
✔✔Environmental System: Cooling - ✔✔Engine driven compressor to the condenser
assembly to the evaporator to the cabin.
✔✔What does the mixture control do? - ✔✔It regulates the fuel-to-air ratio.The purpose
of a mixture control is to prevent the mixture from becoming too rich at high altitudes,
due to decreasing air density. It is also used to lean the mixture during cross-country
flights to conserve fuel and provide optimum power.
✔✔What are the two fundamental properties of a gyroscope? - ✔✔Rigidly in space: A
gyroscope remains in a fixed position in the plane in which it is spinning.
Precession: The titling or turning of a gyro in response to a deflective force. The
reaction to this force does not occur at the point where it was applied; it occurs at a
point 90 degrees later in the direction of ration. The rate at which the gyro presses is
inversely proportional to the speed of the rotor and proportional to the deflective force.
✔✔ Max weight - takeoff/landing - ✔✔3150lbs
✔✔Min weight - ✔✔2100lbs
✔✔Max weight (baggage) - ✔✔130lbs
✔✔Max altitude - take off - ✔✔10,000 MSL
✔✔Max Optimum Altitude - ✔✔17,500 MSL
✔✔Max crosswind - ✔✔20kts
✔✔Min time to max thrust from zero - ✔✔3sec
✔✔Max CHT - ✔✔435F
✔✔Fuel 100LL Color - ✔✔Blue
✔✔Fuel 100 Color - ✔✔Green
QUESTIONS AND ANSWERS SURE A+
✔✔Pitot tube blockage - ✔✔The only instrument affected is the airspeed indicator.
■ Ram air inlet clogged and drain hole open? Airspeed drops to zero.
■ Both air inlet and drain hole are clogged? The airspeed indicator will act as an
altimeter, and will no longer be reliable.
■ When suspecting a pitot blockage, consider the use of pitot heat to melt ice that may
have formed in or on the pitot tube.
✔✔One static source blocked always results in? - ✔✔Altimeter/ASI/VSI: Inaccurate
readings while sideslipping; very sensitive in turbulence
✔✔Both static sources blocked? - ✔✔Altimeter: Doesn't change with altitude; if blocked
before takeoff, indicate field elevation
ASI: Decreases during climb and increases during descent
VSI: Indicates the last vertical speed before becoming blocked
✔✔All static and pitot sources blocked - ✔✔Altimeter/ASI/VSI: Indication remains
constant regardless of actual changes
✔✔Oxygen System - ✔✔No oxygen system in cirrus SR20
, ✔✔Deicing/Anti icing - ✔✔Cirrus SR20 only has pitot heater and deicing/anti icing
measurement.
✔✔Pitot Static System - ✔✔Altimeter, vertical speed indicator, airspeed indicator (ram
air)
✔✔Environmental System: Heating - ✔✔Heat exchange compressor (surrounds the
exhaust mufflers) + ram air -> the mixing chamber -> cabin
✔✔Environmental System: Cooling - ✔✔Engine driven compressor to the condenser
assembly to the evaporator to the cabin.
✔✔What does the mixture control do? - ✔✔It regulates the fuel-to-air ratio.The purpose
of a mixture control is to prevent the mixture from becoming too rich at high altitudes,
due to decreasing air density. It is also used to lean the mixture during cross-country
flights to conserve fuel and provide optimum power.
✔✔What are the two fundamental properties of a gyroscope? - ✔✔Rigidly in space: A
gyroscope remains in a fixed position in the plane in which it is spinning.
Precession: The titling or turning of a gyro in response to a deflective force. The
reaction to this force does not occur at the point where it was applied; it occurs at a
point 90 degrees later in the direction of ration. The rate at which the gyro presses is
inversely proportional to the speed of the rotor and proportional to the deflective force.
✔✔ Max weight - takeoff/landing - ✔✔3150lbs
✔✔Min weight - ✔✔2100lbs
✔✔Max weight (baggage) - ✔✔130lbs
✔✔Max altitude - take off - ✔✔10,000 MSL
✔✔Max Optimum Altitude - ✔✔17,500 MSL
✔✔Max crosswind - ✔✔20kts
✔✔Min time to max thrust from zero - ✔✔3sec
✔✔Max CHT - ✔✔435F
✔✔Fuel 100LL Color - ✔✔Blue
✔✔Fuel 100 Color - ✔✔Green
