(12)
(13)
(14)
Pitch wheel - Check that trim responds
to pitch wheel movement. (UP TRIM
and DN TRIM annunciators may
illuminate).
Heading bug - Center and engage HDG.
Check that control follows a turn in each
direction.
Disengage AP by selecting GA. Check
that AP disengages and FD commands
7° nose up, wings level attitude. YD
disengage - Autopilot mode selector -
STBY.
7. Electric elevator trim - Check.
a.
b.
operation.
Elevator trim switch - ON.
Pilot and copilot trim switches - Check
WARNING
Operation of the electric trim system should
occur only by movement of pairs of switches.
Any movement of the elevator trim wheel
while depressing only one switch element
denotes a system malfunction. The electric
elevator trim control switch must then be
turned OFF and flight conducted by
operating the elevator trim wheel manually.
Do not use autopilot.
C.
d.
(1) Pilot and copilot. Check individual
element for no movement of trim, then
check proper operation of both elements.
(2) Check pilot switches override copilot
switches while trimming in opposite
directions, and trim moves in direction
commanded by pilot.
Check pilot and copilot trim disconnects
while activating trim.
Elevator trim switch - OFF then ON
(ELECT
T R I M O FF
annunciator
extinguishes).
8.
Avionics - Check and set as required.
9.
INS - NAV mode, if on.
10. Flaps - Check.
11.
Altimeters - Set and check.
TM 55-1510-221-10
8-37. TAXIING.
CAUTION
Excessive use of brakes with the increased
weight of this aircraft will increase the
possibility of brake failure and/or brake fire.
Judicious use of the brakes is recommended
with coordinated use of beta range.
Taxi speed can be effectively controlled by the use of
power application and the use of the variable pitch
propellers in beta range. Normal turns may be made
with the steerable nose wheel; however, a turn may be
tightened by using full rudder and inside brake as
necessary. Turns should not be started with brakes
alone, nor should the aircraft be pivoted sharply on one
main gear.
1. Brakes - Check.
2. Flight instruments - Check for normal operation.
8-38. ENGINE RUNUP.
1.
Mission control panel - Set.
*2.
Propeller manual feathering - Check as follows:
a.
b.
CONDITION lever - LOW IDLE.
Left propeller lever - FEATHER Check that
propeller feathers.
c. Left propeller lever - HIGH RPM.
d. Repeat procedure for right propeller.
*3.
Autofeather- Check as follows:
a.
b.
c.
d.
CONDITION levers - LOW IDLE.
AUTOFEATHER switch - Hold to TEST.
(#1
AUTOFEATHER and
#2
AUTOFEATHER advisory annunciator
lights should remain extinguished.)
P O W E R l e v e r s -
Advance
until
AUTOFEATHER lights are illuminated
(approximately 22% torque).
Left POWER lever - Retard and check:
(1)
(2)
At 16 - 21%
torque - #2
AUTOFEATHER light out.
At
9
-
14%
torque
-
Both
AUTOFEATHER lights out and left
propeller starts to feather.
Change 4
8-15
