TM 55-1510-221-10
e.
Left pneumatic and environmental switches -
OPEN. Check that L BL AIR FAIL and R BL
AIR FAIL, and L BL AIR OFF and R BL AIR
OFF annunciator lights are extinguished.
f.
Pneumatic pressure - Verify 12 to 20 PSI.
g.
Right pneumatic and environmental switches -
OPEN.
* 11. Pressurization system - Check as follows:
a. Cabin door caution light - Check
extinguished.
b.
Storm windows - Check closed.
c.
Bleed air valve switches - Check OPEN.
d. Cabin altitude - Set 500 feet lower than
airfield elevation.
e.
Cabin pressure/dump switch - TEST (hold).
f.
Cabin rate-of-climb gage - Check for descend-
ing indication and, when confirmed, release
cabin pressure/dump switch from TEST.
g. Aircraft altitude - Set to planned cruise
altitude plus 500 feet. (If this setting does not
result in a CABIN ALT indication of at least
500 feet over takeoff field pressure altitude,
adjust as required).
12. CONDITION levers - As required
13. ANTI-ICE - As required.
NOTE
If windshield anti-ice is needed prior to takeoff,
use normal setting for a minimum of 15
minutes prior to selecting high temperature to
provide adequate preheating and minimize
effects of thermal shock.
8-39. BEFORE TAKEOFF.
0
1. Autofeather switch - ARM.
2. Bleed air valves - As required.
0
3. Ice & rain switches - As required.
4. Fuel panel - Check fuel quantity and switch
positions.
0
5. Flight and engine instruments - Check for normal
indications.
06.
Cabin altitude and rate-of-climb controller - Set.
0
7. Annunciator panels - Check (note indications).
8. Propeller levers - HIGH RPM.
9. Flaps - As required.
10. Trim - Set.
11. Avionics - Set.
12. Flight controls - Check
0
13. Departure briefing - Complete.
8-40. LINE UP.
01.
Transponder - As required.
02. Engine autoignition switch - ARM.
3. Power stabilized - Check approximately 25%
minimum.
04.
CONDITION levers - LOW IDLE.
5.
Lights - As required.
6.
Mission control panel - Set.
8-41. TAKEOFF.
To aid in planning the takeoff and to obtain
maximum aircraft performance, make full use of the
information affecting takeoff shown in Chapter 7.
The data shown is achieved by setting brakes, set-
ting takeoff power, and then releasing brakes. When
runway lengths permit, the normal takeoff may be
modified by starting the takeoff after power has
been stabilized at approximately 25% torque, then
applying power smoothly so as to attain full power
no later than 65 KIAS. This will result in a
smoother
takeoff but will significantly increase
takeoff distance.
a. Normal Takeoff. After LINE Up procedures
have been completed, release brakes and smoothly
apply power to within 5% of target. Power should
be applied at a rate that will produce takeoff power
by 40 KIAS. Maintain directional control with
nosewheel steering rudder, and differential power,
while maintaining wings level with ailerons. The
pilot should retain a light hold on the power levers
throughout the takeoff and be ready to initiate
ABORT procedures if required. The copilot should
insure that the AUTOFEATHER advisory lights are
illuminated (if applicable), adjust and maintain power
at the exact takeoff power settings, and monitor all
engine
instruments.
The pilot will rotate at the
recommended rotation speed (Vr) and establish the
climb attitude (9° to 16°) that will attain best rate-
of-climb airspeed (Vy) during the initial climb.
Rotation should be at a rate that will allow liftoff
at liftoff airspeed (V1of).
b. Crosswind Takeoff. Position the aileron control
into the wind at the start of the takeoff roll to
maintain a
wings level attitude. Under strong
crosswind conditions, leading with upwind power at
the beginning of the takeoff roll will assist in main-
taining directional control. As the nosewheel comes
off the ground, the rudder is used as necessary to
Change 3
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