(a)  
Move the stabilizer until Dimension B (Fig. 502) on the stabilizer ballscrew actuator is 15.89 | 0.01 inches

 (403.6 +/- 0.3 mm).
 (b)  
If removed, install the four decentering springs to the upper and lower arms of the feel and centering unit.

 (c)  
If disconnected, connect the output control rods for the left and right aft quadrants to the crank arms.

 (d)  
Make sure that rig pin E/ST8 and E/ST9 is not installed.

 (e)  
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags: 1) 11E17, FLT CONT COMPUTER POWER LEFT 2) 11E20, FLIGHT CONT CMPTR PWR CENTER 3) 11E35, FLT CONT CMPTR PWR RIGHT

 (f)  
Disconnect the electrical connector from the transducer.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-00
 ALL  ú ú 07 Page 542 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 825-051
 (2) Neutral Shift Transducer Adjustment (PROCEDURE 1):
 (a)  Remove the electrical connector from one of the three neutral
 shift transducers.
 (b)  Connect the breakout box and the -27 cable assemblies to the
 transducer (Fig. 510).
 (c)  Connect the PAV to the breakout box at pins 3 (SIG LO), 5 (SIG
 HI), and 7 (GND).
 (d)  Connect the power supply to the breakout box at pins 2 (LO) and
 1 (HI).
 (e)  Adjust the power supply to 26 | 0.02 volts ac RMS.
 (f)  Supply 26 | 0.02 volts ac RMS from the power supply HI and LO
 to the PAV at the applicable REF pins.
 (g)  Loosen the clamping nut on the transducer clamp such that the
 transducer body can turn.
 (h)  Turn the body until there is an in-phase absolute output
 voltage of less than 1.25v ac.
 NOTE: The zero mark on the body must be less than 30 degrees____
 from the zero mark on the shaft.
 (i)  Tighten the clamping nut.
 (j)  Make sure that the absolute output in-phase voltage is less
 than 1.25v ac.
 (k)  Remove the lockwire from the control rod that is attached to
 the sensor crank.
 (l)  Turn the adjustment nut on the control rod to get the smallest
 possible in-phase voltage.
 (m)  Make sure that the voltage does not have an absolute value
 larger than 0.040v ac.
 (n)  Use the breakout box and repeat the same adjustment steps for
 the other two neutral shift transducers.
 (o)  Turn the feel unit input crank approximately 5-degrees
 clockwise.
 (p)  With the crank held at 5-degrees, measure the in-phase output
 of each transducer.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-00
 ALL  ú ú 08 Page 543 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (q)  
Make sure that the voltage is in-phase with the input voltage.

 (r)  
Make sure that the difference in the voltage between two transducers is not more than 0.40v ac.

 (s)  
Turn the feel unit input crank counterclockwise approximately 2-degrees.

 (t)  
With the crank held at 2-degrees, measure the in-phase output of each transducer.

 (u)  
Make sure that the voltage is in-phase with the input voltage.

 (v)  
Make sure that the difference in the voltage between two transducers is not more than 0.40v ac.

 (w)  
Put a lockwire on the control rod.

 (x)  
Disconnect the power supply and the PAV from the breakout box.

 (y)  
Disconnect the breakout box and the -27 cable assembly from the transducer.

 S 825-052
 (3)  
Neutral Shift Transducer Adjustment (PROCEDURE 2):

 (a)  
Remove the electrical connector from one of the three neutral shift transducers.

 (b)  
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 飛行操縱 FLIGHT CONTROLS 3(20)