EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 2) 7F26 PSEU SECT 2
 S 745-018
 (3)  
Do a test of the gear lever switch:

 (a)  
Make sure the CDU display of label 270/00 is shown as follows:

 ~............................................................ | Sensor and Bit Location | Bit State | Description| .............................................................. |L Body Tilt on Bit 19 | 0 |NOT TILTED | .............................................................. |L Wing Tilt on Bit 20 | 0 |NOT TILTED | .............................................................. |R Wing Tilt on Bit 22 | 0 |NOT TILTED | .............................................................. |R Body Tilt on Bit 23 | 0 |NOT TILTED | 2.................................….............…............1

 (b)  
Push the NEXT PAGE key as necessary to show the logic
 conditions of label 271/00.

 (c)  
Make sure the CDU display of label 271/00 is shown as follows:

 ~............................................................ | Signal and Bit Location | Bit State | Description| .............................................................. |Air/Gnd Gnd Mode on Bit 21 | 1 |GND MODE | .............................................................. |Gear Lever Switch on Bit 25 | 1 |LEVER DOWN | 2.................................….............…............1

 (d)  
Make sure the landing gear lever cannot be moved from the DN to the UP position without the lock override.

 (e)  
Move the landing gear lever to the UP position with the lock override.

 (f)  
Make sure the CDU display of label 271/00 is shown as follows:

 ~............................................................ | Signal and Bit Location | Bit State | Description | .............................................................. |Gear Lever Switch on Bit 25 | 0 |NOT DOWN | 2.................................…............….............1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-61-00
 ALL  ú ú 01 Page 513 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (g)  
Move the landing gear lever from the UP to the DOWN position.

 (h)  
Push the PREVIOUS PAGE key as necessary to show the logic conditions of label 270/00.

 (i)  
Put an actuator on the sensor, S416 (right wing gear tilt sensor).

 (j)  
Make sure the CDU display of label 270/00 is shown as follows:

 ~............................................................ | Sensor and Bit Location | Bit State | Description | .............................................................. |L Body Tilt on Bit 19 | 0 |NOT TILTED | .............................................................. |L Wing Tilt on Bit 20 | 0 |NOT TILTED | .............................................................. |R Wing Tilt on Bit 22 | 1 |TILTED | .............................................................. |R Body Tilt on Bit 23 | 0 |NOT TILTED | 2.................................…............….............1
 S 745-020
 (4)  Do a test of the tilt sensors for the left and right wing gear:
 NOTE: When the targets for the sensors are far, or a deactuator is
____ installed on the sensor, this will cause a ground mode indication.
 (a)  
Put an actuator on the sensor, S418 (right body gear tilt sensor).

 (b)  
Remove the actuator from the sensor, S416 (right wing gear tilt sensor).

 (c)  
Make sure the CDU display of label 270/00 is shown as follows:

 ~............................................................ | Sensor and Bit Location | Bit State | Description | .............................................................. |L Body Tilt on Bit 19 | 0 |NOT TILTED | .............................................................. |L Wing Tilt on Bit 20 | 0 |NOT TILTED | .............................................................. |R Wing Tilt on Bit 22 | 0 |NOT TILTED | .............................................................. |R Body Tilt on Bit 23 | 1 |TILTED | 2.................................…............….............1
　
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