S 745-141

 (2)  
Push the LSK adjacent to <INPUT MONITORING from the OTHER FUNCTIONS MENU page on the CDU.

 S 745-142

 (3)  
Use the alphanumeric keys on the CDU to put "C/025/350/00" into the scratchpad.

 NOTE: Port 025 = UPR YDM
____
 S 745-143
 (4)  
Push the LSK 1L to move the data into the correct position.

 S 745-144

 (5)
Make sure that bit 12 is "0" for the ARINC word "C/025/350/00".

 NOTE: (LBL 350, SDI 00, BIT 12) = HYDRAULIC PRESSURE
____
 SWITCH FAULT.

 S 865-145
 (6)  Remove the hydraulic pressure from the hydraulic system No. 3. (AMM 29-11-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 22-21-00
 ALL  ú ú 03 Page 520 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 745-146
 (7)  Make sure that bit 12 is "0" for the ARINC word "C/025/350/00". S 865-147
 WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
 SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER.  AILERONS, RUDDERS,
 ELEVATORS, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST
 REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER.

 THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (8)  
Supply the hydraulic pressure to the hydraulic system No. 3. (AMM 29-11-00/201).

 S 865-220

 (9)  
Push and release the engage switch of the upper yaw damper on the Overhead Panel (P5) two times (ON-OFF-ON).

 S 865-149

 (10)
 Stop for 15 seconds (minimum).

 S 715-150

 (11)
 Make sure that the upper yaw damper INOP annunciator goes off.

 S 745-151

 (12)
 Push the LSK adjacent to <INPUT MONITORING from the OTHER FUNCTIONS MENU page on the CDU.

 S 745-152

 (13)
 Make sure that bit 12 is "0" for the ARINC word "C/025/350/00".

 S 745-153

 (14)
 Use the alphanumeric keys on the CDU to put "C/052/350/00" into the scratchpad.

 NOTE: Port 052 = LWR YDM
____
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 22-21-00
 ALL  ú ú 03 Page 521 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 745-154
 (15)
 Push the LSK 1L to move the data into the correct position.

 S 745-155

 (16)
 Make sure that bit 12 is "0" for the ARINC word "C/052/350/00".

 S 865-221

 (17)
 Remove the hydraulic pressure from the hydraulic system No. 2 (AMM 29-11-00/201).

 S 745-157

 (18)
 Make sure that bit 12 is "0" for the ARINC word "C/052/350/00".

 S 865-158

 (19)
 Supply the hydraulic pressure to the hydraulic system No. 2 (AMM 29-11-00/201).

 S 865-159

 (20)
 Push and release the engage switch of the lower yaw damper on the Overhead Panel (P5) two times (ON-OFF-ON).

 S 865-160

 (21)
 Stop for 15 second (minimum).

 S 715-161

 (22)
 Make sure that the INOP annunciator of the lower yaw damper goes off.

 WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
 SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER.  AILERONS, RUDDERS,
 ELEVATORS, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST
 REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER.
 THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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