TM 55-1510-220-10
CAUTION
N1 speeds of 70% or higher may be required to
keep oil temperature within limits.
b. Engine Starting. Use normal procedures in Section
II. Engine starting under conditions of high ambient
temperatures may produce a higher than normal TGT
during the start. The TGT should be closely monitored
when the condition lever is moved to the LO IDLE position.
If overtemperature tendencies are encountered. the condi-
tion lever should be moved to the IDLE CUTOFF position
periodically during acceleration of gas generator RPM (N1).
Be prepared to abort the start before temperature limitations
are exceeded.
c. Warm-Up Ground Tests. Use normal procedures in
Section II. To minimize the possibility of damage to the en-
gines during dusty/sandy conditions, activate ICE VANES
if the temperature is below 15°C.
d. Taxing. Use normal procedures in Section II.
When practical, avoid taxiing over sandy terrain to mini-
mize propeller damage and engine deterioration that results
from impingement of sand and gravel. During hot weather
operation. use minimum braking action to prevent overheat-
ing.
e. Takeoff. Use normal procedures in Section II.
Avoid taking off in the wake of another aircraft if the run-
way surface is sandy or dusty.
f.
During Flight.
Use normal procedures in Section II.
g. Descent.
Use normal procedures in Section II.
h. Landing. Use normal procedures in Section II.
i. Engine Shutdown. Use normal procedures in Sec-
tion II.
CAUTION
During hot weather, if fuel tanks are completely
filled, fuel expansion may cause overflow.
thereby creating a tire hazard.
j. Before Leaving Aircraft. Use normal procedures in
Section II. Take extreme care to prevent sand or dust from
entering the fuel and oil system during servicing. During
hot weather. release the brakes immediately after installing
wheel chocks to prevent brake disc warpage.
8-70. TURBULENCE AND THUNDERSTORM
OPERATION.
CAUTION
Due to the comparatively light wing loading.
control in severe turbulence and thunderstorms
is critical. Since turbulence imposes heavy
loads on the aircraft structure, make all neces-
sary changes in aircraft attitude with the least
amount of control pressures to avoid excessive
loads on the aircraft’s structure.
Thunderstorms and areas of severe turbulence should be
avoided. If such areas are to be penetrated. it will be neces-
sary to counter rapid changes in attitude and accept major
indicated altitude variations. Penetration should be of an al-
titude which provides adequate maneuvering margins as a
loss or gain of several thousand feet of altitude may he
expected. The recommended penetration speed in severe
turbulence is 170 KIAS. Pitch attitude and constant power
settings are vital to proper flight technique. Establish
recommended penetration speed and proper attitude prior to
entering turbulent air to minimize most difficulties. False
indications by the pressure instruments due to barometric
pressure variations within the storm make them unreliable.
Maintaining a pre-established attitude will result in a fairly
constant airspeed. Turn cockpit and cabin lights on to mini-
mize the blinding effects of lighting. Do not use autopilot
altitude hold Maintain constant power settings and pitch at-
titude regardless of airspeed or altitude indications. Con-
centrate on maintaining a level attitude by reference to the
flight director/attitude indicator. Maintain original heading.
Make no turns unless absolutely necessary.
Change 6
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