S 862-026

 (2)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11A18, YAW DAMPER LEFT

 (b)  
11C6, CSEU 1L AC
 or
 FLT CONT FLEC 1L AC

 (c)  
11C7, CSEU 1L DC
 or
 FLT CONT ELEC 1L DC

 (d)  
11C8, CSEU 2L AC
 or
 FLT CONT ELEC 2L AC

 (e)  
11C9, CSEU 2L DC
 or
 FLT CONT ELEC 2L DC

 (f)  
11F34, YAW DAMPER RIGHT

 (g)  
11G17, CSEU 1R AC
 or
 FLT CONT ELEC 1R AC

 (h)  
11G18, CSEU 1R DC
 or
 FLT CONT ELEC 1R DC

 (i)  
11G27, CSEU 2R AC
 or
 FLT CONT ELEC 2R AC

 (j)  
11G28, CSEU 2R DC
 or
 FLT CONT ELEC 2R DC

 S 862-027
 (3)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
 (a)  
11H17, FLT CONT SHUTOFF TAIL LEFT

 (b)  
11H18, FLT CONT SHUTOFF TAIL CENTER

 (c)  
11H28, FLT CONT SHUTOFF TAIL RIGHT

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 S 982-028
 (4)  
Put the L, C, and R FLT CONTROL SHUTOFF switches on the panel P61 in the ON position.

 S 862-029

 (5)  
Make sure these systems operate:

 (a)  
Rudder and Rudder Trim Control System (AMM 27-21-00/501)

 (b)  
Air Data Computing System (AMM 34-12-00/501)

 (c)  
Inertial Reference System (AMM 34-21-00/501)

 (d)  
Air/Ground Relays (AMM 32-09-02/501)

 (e)  
Master Dim and Test System (AMM 33-16-00/501)

 (f)  
Engine Indication and Crew Alerting System (AMM 31-41-00/501)

 S 982-030
 (6)  Push the STATUS switch on the EICAS display select panel, on panel P9, to the flight control positions.
 S 862-060
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (7)  
For the left yaw damper system, pressurize the left hydraulic system (AMM 29-11-00/201).

 S 862-032

 (8)  
For the right yaw damper system, pressurize the center hydraulic system (AMM 29-11-00/201).

 B. Test valves
 S 982-033
 (1)  
Push the YAW DAMPER L or R switch/light on the P5 panel make sure that ON light comes on.

 S 282-034

 (2)
Make sure that the applicable YAW DAMPER L or R INOP light is off.

 NOTE:____Two persons are necessary for the steps below. One is necessary in the flight compartment and one in the main electrical/electronic equipment center.
 S 862-035
 (3)  Open this circuit breaker on the P11 panel to stop the operation of the left (right) servo.
 (a)  11A18, YAW DAMPER LEFT
 (11F34, YAW DAMPER RIGHT)

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 22-21-03
 ALL  ú ú 02 Page 208 ú May 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 S 282-036
 (4)  Make sure that the YAW DAMPER L (R) INOP light is on.
 S 982-037
 (5)  Put the YAW DMPR test switch on P61 in the L (R) position, then put
 the switch back to the center position.
 S 282-038
 (6)  Make sure that the rudder position indicator on the EICAS display
　
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