Century 2000 Pilots Operating Manual page 8

PREFLIGHT TEST SEQUENCE
CENTURY 2000 PREFLIGHT PROCEDURES
FOR "A" MOD. CENTURY 2000
During system functional check the system must be provided adequate
D.C. voltage (12.0 VDC or 24 VDC min.) and instrument air (4.2 in. Hg.
Min.). It is recommended that the engine be operated to provide the
necessary power and that the aircraft be positioned in a level attitude,
during the functional check. Due to the weight of the elevator in certain
models of aircraft, steps 4 and 5 may not move the control wheel. To
verify correct direction of commands, support elevators to remove weight
and continue steps.
AUTOPILOT/AUTOTRIM - To be performed before the first flight of each
day.
*1. Trim Master Switch - ON.
2. Engage Autopilot.
3. Move the heading bug left and right of the lubber line. Observe that
the control wheel moves in the direction of the heading bug
displacement.
*4. Press the DN Switch - verify that the control wheel moves in the down
direction. Verify that after approximately a 3 second delay, the trim
moves in the down direction.
*5. Press the UP Switch - verify that the control wheel moves in the up
direction. Verify that after approximately a 3 second delay, the trim
moves in the up direction.
6. Grasp control wheel and override roll and pitch servo actuators to
assure override capability.
7. Hold control yoke and disengage autopilot by activating the AP OFF
Switch on the control wheel or by the programmer off switch.
8. Check controls through full travel in roll and pitch to assure complete
autopilot disengagement.
9. With autopilot OFF, press and hold TST switch. All available mode
annunciators shall illuminate for 3 seconds then extinguish and the
AP shall flash as long as the TST switch is held.
*10. Release the TST switch. Only HDG, ATT and TST shall be illuminated.
*11. Press and hold the DN switch. The TST annunciator may momentarily
flicker but should remain illuminated.
remain on. Release the DN switch.
NOTE
HDG and ATT shall
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*12. Press and hold the UP switch. The TST annunciator may momentarily
flicker but should remain illuminated. HDG and ATT shall remain on.
Release the UP switch.
*13. Momentarily press and hold the TST switch.
annunciators shall flash and the HDG and ATT shall stay illuminated.
Release the TST switch. The HDG and ATT shall remain on the TST
annunciator shall remain flashing.
*14. Press and hold the DN switch. The TST annunciator shall extinguish.
HDG and ATT shall remain on. Release the DN switch.
*COMMAND TRIM SYSTEM - To be performed before the first flight of
each day.
1. Using the control wheel trim switch, verify normal trim up and down
operation.
2. Move red portion of trim switch forward and aft. Observe that the trim
system does not operate.
3. Release the red bar on the control wheel trim switch. Move the black
portion fore and aft. Observe that the trim system does not operate.
Any failure of the above procedures indicates that a failure exists in the
system and the system shall not be operated until the failure has been
located and corrected.
Check the elevator trim setting before takeoff.
The AP and TST
CAUTION
CAUTION
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