757 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(155)

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 (e) (f) (g) (h)  Connect DVM No. 2 to the breakout box at pins 1 (LO) and 2 (HI) to monitor airplane power.Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel: 1) 11J13, ELEVATOR POS LEFT (to adjust the left transmitter) 2) 11J21 or 11J22, ELEV POS RIGHT (to adjust the right transmitter)Make sure that the airplane input voltage is between 24 and 30 volts ac RMS (shown on DVM No. 2).Turn the adjusting nut to adjust the control rod length until the output voltage (between pins 4 and 5 on the breakout box) is 0.21 | 0.05 volts ac RMS (shown on DVM No. 1).
 NOTE:____ The voltage will decrease as you make the control rod shorter.
 (i)  Make sure the rod center-to-center dimension is between 9.08 and 9.47 inches (230.6-240.5 mm).
 NOTE:____ The transmitter body can be turned in its bracket for the necessary thread and voltage conditions. If you turn the transmitter, tighten the screws and apply sealant (Ref 27-38-02).
 (j) (k) (l)  Put lockwire on the control rod adjusting nut.Make sure that the output voltage shown on DVM No. 1 is 0.21 | 0.05 volt ac RMS.Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags: 1) 11J13, ELEVATOR POS LEFT

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MAINTENANCE MANUAL

 2) 11J21 or 11J22, ELEV POS RIGHT
 (m)  
Disconnect the breakout box and the -18 cable assembly from the airplane electrical connector.

 (n)  
Disconnect the DVMs from the breakout box.

 (o)  
Disconnect the breakout box and the -19 cable assembly from the position transmitter connector.

 (p)  
Connect the airplane electrical connector to the position transmitter connector.

 S 825-026
 (9)  Do the steps that follow to adjust the position transmitters (PROCEDURE 3):
 NOTE: PROCEDURE 3 uses the EICAS computer and a person in the
____
 control cabin and a person at the elevator.

 (a)  
Install equipment for the person in the control cabin to speak with the person by the position transmitter.

 (b)  
Make sure these circuit breakers on the P11 panel are closed: 1) EICAS (6 locations) 2) 11J13, ELEVATOR POS LEFT 3) 11J21 or 11J22, ELEV POS RIGHT 4) 11K9, LEFT ENGINE OIL PRESS 5) 11K35, RIGHT ENGINE OIL PRESS

 (c)  
Push the STATUS button on the EICAS display select panel, P9, to show the elevator position indicator on the EICAS display.

 (d)  
Turn the adjusting nut to adjust the control rod length until the left (right) elevator position indicator arrow is as follows (Fig. 501): 1) Aligned with the middle EICAS tick mark.

 (e)  
Make sure the rod center-to-center dimension is between 9.08 and 9.47 inches (230.6-240.5 mm).

 NOTE: The transmitter body can be turned in its bracket for
____ the necessary thread and voltage conditions. If you turn the transmitter, tighten the screws and apply sealant (Ref 27-38-02).
 (f)  
Put lockwire on the adjustment nut on the control rod.

 (g)  
Make sure that the position indicator arrow did not moved.

 S 865-027
 (10)
 Remove the power from the left, right, and center hydraulic systems (Ref 29-11-00).

 (11)
 Remove electrical power (Ref 24-22-00).

 (12)
 Remove rig pins E/ST8 and E/ST9.

 S 865-028
 S 095-029
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757
MAINTENANCE MANUAL

 S 095-030
 (13)
 Remove the rope and the DO-NOT-OPERATE tag from the control columns.

 S 415-031

 (14)
 Install the access panels for the middle PCAs, 335DB and 345DB (Ref 06-42-00).

 S 415-032

 (15)
 Install the access panels for the position transmitters, 335CB and 345CB (Ref 06-42-00).

 S 705-033

 (16)
　
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