(65)
Set PISTON A and ENGAGE A switches to OFF, then ON. Check that elevator does not move.
(66)
Set PISTON B and ENGAGE B switches to ON.
(67)
Set SOLENOID A switch to +HDOVR. Check that elevator does not move more than 0.25 inch (0.42 degree).
(68)
Set SOLENOID A switch to A NORM, then -HDOVR. Check that elevator does not move more than 0.25 inch (0.42 degree).
(69)
Set SOLENOID A switch to A NORM.
(70)
Set SOLENOID B switch to +HDOVR. Check that elevator does not move more than 0.25 inch (0.42 degree).
(71)
Set SOLENOID B switch to B NORM, then -HDOVR. Check that elevator does not move more than 0.25 inch (0.42 degree).
(72)
Set SOLENOID B switch to B NORM.
(73)
Set ACTUATOR SELECT switch to A & B COMMON.
(74)
Adjust POSITION CONTROL A knob until trailing edge of elevator moves to 1.20士0.06 inches (2.00 士0.10 degrees) below index. Lock knob in place.
(75)
Connect VTVM to LVDT FEEDBACK -B, jacks J10B and J11B and record voltage.
(76)
Set ACTUATOR SELECT switch to A & B INDEPENDENT.
(77)
Set PISTON A and ENGAGE A switches to OFF.
(78)
Adjust POSITION CONTROL B knob until VTVM reads within 士0.03 volts of reading taken in Step (75) and elevator position is 1.20士0.06 inches (2.00 士0.10 degrees) below index. Lock knob in place.
(79)
Set PISTON A and ENGAGE A switches to ON.
(80)
Set PISTON B and ENGAGE B switches to OFF.
(81)
Attach VTVM to LVDT FEEDBACK -A, jacks J10A and J11A.
(82)
Adjust POSITION CONTROL A knob until VTVM reads within 士0.03 volts of reading taken in Step (75) and elevator position is 1.20士0.06 inches (2.00 士0.10 degrees) below index. Lock knob in place.
(83)
Set PISTON B and ENGAGE B switches to ON.
(84)
Ensure that elevator is still 1.20 士0.60 inches (2.00士0.10 degrees) below index. Record elevator position.
(85)
Set SOLENOID B switch to -HDOVR. Check that elevator remains within 0.25 inch
(0.42 degree) of position noted in Step (84).
(86)
Set SOLENOID B switch to +HDOVR. Check that trailing edge of elevator aligns with index within 0.37 inch (0.62 degree) below index to 0.06 inch (0.10 degree) above.
(87)
Set SOLENOID B switch to B NORM.
(88)
Set SOLENOID A switch to +HDOVR. Check that trailing edge of elevator aligns with index within 0.37 inch (0.62 degree) below index to 0.06 inch (0.10 degree) above.
(89)
Set SOLENOID A switch to -HDOVR. Check that elevator moves to within 0.25 inch
(0.42 degree) of position noted in step (84).
(90)
Set POWER switch to OFF.
(91)
Turn OFF hydraulic systems A and B.
(92)
Disconnect and remove test equipment.
(93)
Reconnect airplane wiring to autopilot actuators.
(94)
Install access panel.
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2. A/P Elevator Actuator Test
A. Prepare to Test
(1)
Provide electrical and hydraulic power.
(2)
Check that hydraulic system A and B switches on P5 panel are positioned to ON and that FLT CONT SYS circuit breaker on P6 panel is closed.
WARNING: MAKE SURE ALL PERSONNEL AND OBSTRUCTIONS ARE CLEAR OF AILERON, ELEVATOR, OUTBOARD SPOILERS AND RUDDER SYSTEMS. SURFACES AND CONTROLS MAY MOVE ABRUPTLY WHEN HYDRAULIC POWER IS APPLIED.
(3)
Check that all autopilot, attitude, compass and air data systems circuit breakers are closed on P6 and P18 load control centers.
B. Test Actuator
(1)
Place autopilot A (or B as applicable) engage switch to CWS. Observe that CWS ROLL and CWS PITCH is annunciated. Verify that control column does not jump when system is engaged.
(2)
If excessive control column jump, repeat rigging check, then repeat step (1).
(3)
Exit BITE and engage system in CWS. Push on control column, note increase in pressure required to move control column and check that elevator moves down.
(4)
Pull on control column and check that elevator moves up.
(5)
Return control column to center and disengage autopilot.
(6)
Remove electrical and hydraulic power if no longer required.
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本文链接地址：737 AMM 飞机维护手册 AUTO FLIGHT 自动飞行 2(31)
