Cessna Hawk XP - Recovery from a Spiral Dive; Flight in Icing Conditions; Spins

SECTION 3
EMERGENCY PROCEDURES
CESSNA
MODEL R172K
a descent through a cloud d .
If possible obtain radio cl eek to VFR conditions may be appropriate.
clouds. T~ guard against :a;a~ce f~r an emergency descent through
heading to minimize comp piral dive, choose an easterly or westerly
gles . In addition, keep ha ~s card swings due to changing bank an-
course with rudder controlnb s off tI:ie C~)Iltrol wheel and ~teer a straight
Occasionally check the co Y monito~mg the turn coordmator.
to hold an approximate compass headmg and make minor corrections
up a stabilized let-down cour;.et.. Before descending into the clouds, set
n l ion as follow s:
(1)
Reduce power to set u
(2)
Adjust the mixture P a
5
oo to 800 ft . /min. rate of descent.
(3) Adjust the elevator as ~equired f~r smooth engine operation.
75 KIAS. an rudder trim for a stabilized descent at
( 4) Keep hands off control wheel.
(5) Momtor turn coordinat d
(6) Adjust rudder trim to ;oI· an make corrections by rudder alone.
ent . e ieve un b alanced rudder force, if pres-
(7) Check trend of compass card . ·
rections with rudder to stop turn . movement and make cautious cor-
(8) Upon breaking out of 1 d
c
ou s, resume no r mal cruising flight.
RECOVERY FROM A SPIRAL DIV E
If a spiral is encountered, proceed as follows :
(1)
Close the throttle.
(2~ Stop the turn by using coordinated aileron and rud
ahfgn the symbolic airplane in the turn coordinator wit~e~hcohntrol to
re erence line. e orizon
(3) Cautiously apply elevator back pressure to slowly red h
airspeed to 75 KIAS . uce t e
(4) Adjust the elevator trim control to maintain a 75 KIAS .
(5)
~eep han?s off the control wheel, using rudder control t glide.
straight headmg. Use rudder trim to relieve unbalan d
0
hold a
force , if present. ce rudder
(~) Clear engine occasionally, but avoid using enough p
disturb the trimmed glide. ower to
(7) Upon breaking out of clouds, resume normal cruising fl'
ight.
FLIGHT IN ICING CONDITIONS
. Intentional fli~ht into known icing conditions is prohibited . .
air plane . Durmg mstrument flights, however, icing conditions in this
encountered inadve.rtently and therefor~ so~e corrective action m_ay be
required as shown m the checklists. Imtiat10n of a climb · win be
is usually the
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CESSNA
MODEL R172K
SECTION 3
EMERGENCY PROCEDURES
best ice avoidance action to take; however, alternatives are descent to
warmer air or to reverse course.
STATIC SOURCE BLOCKED
If erroneous instrument readings are suspected due to water, ice, or
other foreign matter in the pressure lines going to the standard exter-
nal static pressure sources, the alternate static source valve should be
pulled on.
A calibration table is provided in Section 5 to illustrate the effect of
the alternate static source on indicated airspeeds. With the windows
and vents closed the airspeed indicator may typically read as much as
4 knots slower and the altimeter 50 feet lower in cruise. With the vents
open and heater on, these variations increase to 7 knots slower and 50
feet lower respectively. If the alternate static source must be used for
landing, airspeed errors of up to 10 knots slower with vents open and 4
knots slower with vents closed can be expected. Altimeter errors re-
main 50 feet low.
NOTE
In an emergency on airplanes not equipped with an alter-
nate static source, cabin pressure can be supplied to the
static pressure instruments by breaking the glass in the
face of the rate - of-climb indicator .
SPINS
Should an inadvertent spin occur, the following recovery procedure
should be used:
(1) RETARD THROTTLE TO IDLE POSITION.
(2) PLACE AILERONS IN NEUTRAL POSITION.
(3) APPLY AND HOLD FULL RUDDER OPPOSITE TO THE DI-
RECTION OF ROTATION .
(4) JUST AFTER THE RUDDER REACHES THE STOP , MOVE
THE CONTROL WHEEL BRISKLY FORWARD FAR ENOUGH TO
BREAK THE ST ALL. Full down elevator may be required at aft
center of gravity loadings to assure optimum recoveries.
(5) HOLD THESE CONTROL INPUTS UNTIL ROTATION STOPS.
Premature relaxation of the control inputs may extend the recov-
ery.
(6) AS ROTATION STOPS, NEUTRALIZE RUDDER , AND MAKE
A SMOOTH RECOVERY FROM THE RESULTING DIVE .
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