747-400 AMM 飞机维护手册 起落架 LANDING GEAR 9(50)

 ~............................................................
 | 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| 0 |NOT OPEN |
 2...............................…..............….............1

Put an actuator on the sensor, S408 (door warning left body
 gear primary sensor).
Remove the actuator from the sensor, S409 (door warning right
 body gear primary sensor).
Make sure the CDU display of label 270/00 is shown as follows:

 ~............................................................
 | Sensor and Bit Location | Bit State | Description |
 ..............................................................
 |L Body Gear Door Open on Bit 24| 0 |NOT 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

Put an actuator on the sensor, S4907 (door warning left wing
 gear primary sensor).
Remove the actuator from the sensor, S408 (door warning left
 body gear primary sensor).

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 ALL  ú ú 04 Page 548 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (o)  
Make sure the CDU display of label 270/00 is shown 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| 0 |NOT 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

 (p)  
Remove the actuator from the sensor, S407 (door warning left wing gear primary sensor).

 H.
Alternate Door Position Test (Fig. 502)

 S 745-265
 (1)  Use the table that follows to identify the port/label and bit data necessary in the subsequent steps.
 NOTE: This data is necessary when you do the system test for the
____
 door warning sensors.

 ~.......................................................................... | BIT TABLE | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | L BODY GR | E/099/272/00 | 24 | NOT OPEN | DOOR OPEN | | DOOR OPEN ALT | | | | | ............................................................................ | L WING GR DOOR | E/099/272/00 | 25 | NOT OPEN | DOOR OPEN | | OPEN ALT | | | | | ............................................................................ | NOSE GR DOOR | E/099/272/00 | 26 | NOT OPEN | DOOR OPEN | | OPEN ALT | | | | | ............................................................................ | R WING GR DOOR | E/099/272/00 | 27 | NOT OPEN | DOOR OPEN | | OPEN ALT | | | | | ............................................................................ | R BODY GR DOOR | E/099/272/00 | 28 | NOT OPEN | DOOR OPEN | | OPEN ALT | | | | | 2................…...................…..........…............….............1
　
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