Century 2000 Pilots Operating Manual page 9

PREFLIGHT TEST SEQUENCE
CENTURY 2000 PREFLIGHT PROCEDURES
FOR "A" MOD. CENTURY 2000
TWO AXIS TRIM PROMPTER
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.
1. Engage autopilot.
2. 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.
3. Press the DN Switch - Verify the control wheel moves in the
DOWN direction.
** Verify that after approximately a 3 second delay, the Trim DN
Prompt flashes.
4. Press the UP Switch - Verify the control wheel moves in the
UP direction.
** Verify that after approximately a 3 second delay the Trim UP Prompt
flashes.
5. Grasp the control wheel and override roll and pitch servo's to assure
override capability.
6. Hold control wheel and disengage autopilot. Check controls through
full travel in all axis to assure complete autopilot disengagement.
7. 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.
8. Release the TST switch. Only HDG, ATT and TST shall be illuminated.
9. Press and hold the DN switch. The TST annunciator may momentarily
flicker but should remain illuminated. HDG and ATT shall remain on.
Release the DN switch.
10. Press and hold the UP switch. The TST annunciator may momentarily
flicker but should remain
shall remain on. Release the UP switch.
NOTE
illuminated. HDG and
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11. 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.
12. Press and hold the DN switch. The TST annunciator shall extinguish.
HDG and ATT shall remain on. Release the DN switch.
13. Press and hold the UP switch. The TST annunciator shall extinguish.
HDG and ATT shall remain on. Release the UP switch.
14. Momentarily press the TST switch.
illuminated, TST annunciator shall extinguish.
**The control wheel may have to be assisted to move up and/or down.
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.
ATT
The AP and TST
HDG and ATT shall remain
CAUTION
CAUTION
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