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 270/00 as follows:
 ~........................................................ | Sensor and Bit Location | Bit State |Description| .......................................................... |L Body Gear Door Open on Bit 24| 1 |DOOR OPEN | |L Wing Gear Door Open on Bit 25| 1 |DOOR OPEN | |Nose Gear Door Open on Bit 26 | 1 |DOOR OPEN | |R Wing Gear Door Open on Bit 27| 1 |DOOR OPEN | |R Body Gear Door Open on Bit 28| 1 |DOOR OPEN | 2...........................…...…............…...........1
 (b)  
Make sure all the landing gear are retracted and the gear doors are closed.

 (c)  
Make sure the CDU shows shows the bit status of label 270/00 as follows:

 ~............................................................ | Sensor and Bit Location | Bit State | Description | .............................................................. |L Body Gear Down/Lock on Bit 11| 0 |NOT DOWN | .............................................................. |L Wing Gear Down/Lock on Bit 12| 0 |NOT DOWN | .............................................................. |R Wing Gear Down/Lock on Bit 13| 0 |NOT DOWN |
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400
MAINTENANCE MANUAL

 ~............................................................ | Sensor and Bit Location | Bit State | Description | .............................................................. |R Body Gear Down/Lock on Bit 14| 0 |NOT DOWN | .............................................................. |L Body Gear Up/Lock on Bit 15 | 1 |GEAR UP | .............................................................. |L Wing Gear Up/Lock on Bit 16 | 1 |GEAR UP | .............................................................. |R Wing Gear Up/Lock on Bit 17 | 1 |GEAR UP | .............................................................. |R Body Gear Up/Lock on Bit 18 | 1 |GEAR UP | .............................................................. |L Body Gear Door Open on Bit 24| 0 |NOT OPEN | .............................................................. |L Wing Gear Door Open on Bit 25| 0 |NOT OPEN | .............................................................. |Nose Gear Door Open on Bit 26 | 0 |NOT OPEN | .............................................................. |R Wing Gear Door Open on Bit 27| 0 |NOT OPEN | .............................................................. |R Body Gear Door Open on Bit 28| 0 |NOT OPEN | 2...............................…..............….............1
 (d)  Make sure the CDU shows shows the bit status of label 271/00 as follows:
 ~............................................................ | Sensor and Bit Location | Bit State | Description | .............................................................. |Nose Gear Down/Lock on Bit 18 | 0 |NOT DOWN/LOCK| .............................................................. |Nose Gear Up/Lock on Bit 19 | 1 |UP AND LOCKED| .............................................................. |Gear Lever Switch on Bit 25 | 0 |NOT DOWN | 2...............................…..............….............1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 865-282
 WARNING:_______ MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE LANDING
 GEAR AND DOOR OPERATION AREA.  A FAST MOVEMENT OF THE LANDING
 GEAR AND DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO

 EQUIPMENT.
 (9)  
Make sure that all persons are away from the landing gear and the landing gear doors.

 S 865-283

 (10)
 Move the landing gear lever from the UP to the DN position.

 NOTE: The nose gear down/lock bit will show a state of 0 when the
____ gear are in transit. Look at the CDU display for the nose gear down/lock bit while the gear is in transit.
 (a)  Look at the bit status for the nose gear down and locked sensors while the gear is in transit, as follows: 1) Make sure the CDU shows shows the bit status of label
 271/00 as follows:
　
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