S 494-027
 CAUTION:_______DO NOT LET THE TORSION LINK FALL. DAMAGE TO THE MOUNTING BRACKET OF THE SQUATCH SWITCH CAN OCCUR.
 (13)
 Use the holding tool for the torsion to safety the link until it is clear of the nose wheel tires.

 I.
Steering Actuators Test

 S 714-028
 (1)  
Do a test of the steering actuators.

 (a)  
Make sure the tillers of the captain and the first officer are in the neutral position.

 (b)  
Make sure the rudder pedals are in the neutral position.

 (c)  
Push OTHER FUNCTIONS on page 2 of the MCDU main menu.

 (d)  
Push INPUT MONITORING.

 (e)  
Write in E/070/271/00 on the scratchpad.

 (f)  
Push the line select key 1L.

 (g)  
Push NEXT PAGE.

 (h)  
Write in E/070/273/00 on the scratchpad.

 (i)  
Push the line select key 1L.

 (j)  
Make sure the condition of these bits for label 273 is as follows:

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-53-11
 ALL  ú ú 01 Page 417 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 ALTERNATE LOCK SWITCHES_______________________ BIT __________ DESCRIPTION
___ BIT STATUS  ___________
 R BODY GR STRNG LEFT 26 1 LOCKED
 R BODY GR STRNG RIGHT 27 1 LOCKED
 L BODY GR STRNG RIGHT 28 1 LOCKED
 L BODY GR STRNG LEFT 29 1 LOCKED
 (k)  
Push PREVIOUS PAGE button and go to page 1.

 (l)  
Make sure the status of these bits for label 271 is as follows:

 PRIMARY LOCK SWITCHES_____________________ BIT __________ DESCRIPTION
___ BIT STATUS ___________
 R BODY GR STRNG LEFT 26 1 LOCKED
 R BODY GR STRNG RIGHT 27 1 LOCKED
 L BODY GR STRNG RIGHT 28 1 LOCKED
 L BODY GR STRNG LEFT 29 1 LOCKED
 (m)  
Turn the tiller of the captain for a right turn (Clockwise).

 (n)  
Make sure that the left actuator on the left body gear extends.

 (o)  
Make sure that the left actuator on the right body gear extends.

 (p)  
Make sure the status of these bits for label 271 is as follows:

 PRIMARY LOCK SWITCHES_____________________ BIT __________ DESCRIPTION
___ BIT STATUS ___________
 R BODY GR STRNG LEFT 26 0 UNLOCKED
 R BODY GR STRNG RIGHT 27 1 LOCKED
 L BODY GR STRNG RIGHT 28 1 LOCKED
 L BODY GR STRNG LEFT 29 0 UNLOCKED
 (q)  
Push PREVIOUS PAGE button and go to page 1.

 (r)  
Make sure the condition of these bits for label 273 is as follows:

 ALTERNATE LOCK SWITCHES_______________________ BIT __________ DESCRIPTION
___ BIT STATUS  ___________
 R BODY GR STRNG LEFT 26 0 UNLOCKED
 R BODY GR STRNG RIGHT 27 1 LOCKED
 L BODY GR STRNG RIGHT 28 1 LOCKED
 L BODY GR STRNG LEFT 29 0 UNLOCKED
 (s)  
Turn the tiller of the captain for a left turn (Counterclockwise).

 (t)  
Make sure that the right actuator on the left body gear extends.

 (u)  
Make sure that the right actuator on the right body gear extends.

 (v)  
Make sure the condition of these bits for label 273 is as follows:

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-53-11
 ALL  ú ú 01 Page 418 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 ALTERNATE LOCK SWITCHES_______________________ BIT __________ DESCRIPTION
___ BIT STATUS  ___________
 R BODY GR STRNG LEFT 26 1 LOCKED
 R BODY GR STRNG RIGHT 27 0 UNLOCKED
 L BODY GR STRNG RIGHT 28 0 UNLOCKED
 L BODY GR STRNG LEFT 29 1 LOCKED
 (w)  
Push NEXT PAGE and go to page 2.

 (x)  
Make sure the condition of these bits for label 271 is as follows: