SECTION 3
EMERGENCY PROCEDURES
1.
Apply full rich mixture.
2.
Use full carburetor heat.
CESSNA
MODEL 172N
3.
Reduce power to set up a 500 to 800 ft/ min rate of descent.
4.
Adjust the elevator trim and rudder trim (if installed) for a
stabilized descent at 70-80 KIAS.
5.
Keep hands off the control wheel.
6.
Monitor turn coordinator and make corrections by rudder alone.
7.
Check trend of compass card movement and make cautious
corrections with rudder to stop the tum.
8.
Upon breaking out of clouds, resume normal cruising flight.
RECOVERY FROM A SPIRAL DIVE
If a spiral is encountered, proceed as follows:
1.
Close the throttle.
2.
Stop the turn by using coordinated aileron and rudder control to
align the symbolic airplane in the turn coordinator with the
horizon reference line.
3.
Cautiously apply elevator back pressure to slowly reduce the
airspeed to 80 KIAS.
4.
Adjust the elevator trim control to maintain an 80 KIAS glide.
5.
Keep hands off the control wheel, using rudder control to hold a
straight heading. Adjust rudder trim (if installed) to relieve
unbalanced rudder force.
6.
Apply carburetor heat.
7.
Clear engine occasionally, but avoid using enough power to
.
disturb the trimmed glide.
8.
Upon breaking out of clouds, resume normal cruising flight.
INADVERTENT FLIGHT INTO ICING CONDITIONS
Flight into icing conditions is prohibited. An inadvertent encounter
with these conditions can best be handled using the checklist procedures.
The best procedure, of course, is to turn back or change altitude to escape
icing conditions.
STATIC SOURCE BLOCKED
If erroneous readings of the static source instruments (airspeed,
altimeter and rate-of-climb) are suspected, the alternate static source
valve should be pulled on, thereby supplying static pressure to these
instruments from the cabin.
3-14
1 July 1979
