Cessna 172N Skyhawk Quick Reference Manual page 21

Emergency Descent
Note
1.
Power............................................................................................................................ Idle
2.
Mixture......................................................................................................................... Full
3.
Carb Heat....................................................................................................................... On
4.
Airspeed.................................................................................................................. 73 KTS
5.
Bank.......................................................................................................................... 35-45
6.
Landing Spot.................................................................. Recover from Descent Downwind
•
A spiraling descent is made as rapidly as possible to lower alitutde or to the ground for an emergency landing. A fire, sickness,
loss of cabin pressurization, or other situations may demand this maneuver.
Common Errors:
o
Failure to respond quickly to the emergency
o
Failure to properly configure the airplane
o
Lack of coordination and control (airspeed or rate of descent)
o
Loss of reference point or becoming disoriented
o
Failure to aviate, navigate, communicate
Engine Roughness
1.
Carb Heat...................................................................................................................... On
•
2.
Mixture.................................................................................................... Max Smoothness
3.
Carb Heat...................................................................................................................... Off
4.
Fuel Pump...................................................................................................................... On
5.
Fuel Selector.................................................................................................. Switch Tanks
6.
Engine Indicators.................................................................................... Monitor/DECIDE
7.
Magnetos................................................................................................ Verify Singlularly
•
Engine roughness can be caused by several factors including carburetor or intake icing, ice build up over the air intake, carbon
build up on the spark plugs, fuel contamination, fuel deficiencies, excessive leaning, and more.
Common Errors:
o
Failure to respond quickly to engine roughness
o
Misdiagnosis of the prevailing issues
o
Lack of planning for emergency maneuvers
o
Failure to aviate, navigate, communicate
Prepare for Landing (No Engine Power)
If Roughness Continues After 1 Minute:
Prepare for Engine Power Loss (In Flight)
Description:
Description:
o
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