column (Fig. 504) 3) The cable tension regulator scale position is correct for the ambient temperature (Fig. 504).
(c)
The input rods for the PCA are adjusted correctly if the conditions that follow can occur at the same time: 1) Rig pin E/ST7 is installed 2) Rig pins E/ST8 and E/ST9 (Fig. 509) can be freely put in
the middle PCAs.
(d)
The PCA centering springs are adjusted correctly if the conditions that follow can occur at the same time: 1) Rig pins E/ST8 and E/ST9 are installed 2) The tangent points of the PCA centering springs are aligned
(Fig. 509).
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(e)
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757 MAINTENANCE MANUAL
The elevator PCAs are adjusted correctly if the conditions that
follow can occur at the same time:
1) Rig pin E/ST7 is installed
2) The left, right, and center hydraulic systems are pressurized
3) The upper surface of the left and right elevator trailing edge is less than 0.15 inch (3.8 mm) from the locating hole on the index plate (Fig. 505).
The elevator position transmitters are adjusted correctly if
the conditions that follow can occur at the same time:
1) The control columns are in the neutral position (shake the control columns to make sure they are in the neutral position)
2) The left, right, and center hydraulic systems are pressurized
3) The left and right elevator position indicators approximately align with the middle tick mark on the EICAS display
4) The elevator position indicators are less than one-half the height of an indicator arrow away from each other.
The elevator position transmitters are adjusted correctly if
the conditions that follow can occur at the same time:
1) Operate the captain's control column through its full fore and aft travel range
2) The elevator position indicators on the EICAS display follow the movement of the control column
3) The elevator position indicators are less than one-half the height of an indicator arrow away from each other.
The elevator feel computer is adjusted correctly if rig pin
E/ST11 (Fig. 508) can be freely put in the elevator feel
computer.
The elevator PCAs are adjusted correctly if the elevators
operate as follows:
1) The left and right elevator trailing edges move up and down together at the same rate,
2) The elevators are less than 0.15 inch (3.8 mm) away from each other at full elevator travel (Fig. 505),
3) The elevators stop at the same position when the control column is held at a position between the full travel stops.
The upper control rod for the elevator feel and centering unit
is adjusted correctly if the conditions that follow can occur
at the same time:
1) The control columns are at the neutral position
2) The left, right, and center hydraulic systems are pressurized
3) The horizontal stabilizer is at 2 units of trim on the stabilizer position indicators (Fig. 501)
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本文链接地址：757 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(13)
