747-400 AMM 飞机维护手册 起落架 LANDING GEAR 9(58)

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 ~...................................................... | Sensor and Bit Location |Bit State |Description| ........................................................ |Nose Gear Down/Lock on Bit 18 | 0 |NOT DN/LOCK| 2...............................…..........…...........1
 (b)  Make sure all the landing gear go down and the gear doors close.
 S 865-284
 (11)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7 Overhead Circuit Breaker Panel 1) 7F23 LANDING GEAR DSP & CONT ALTN

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747-400 MAINTENANCE MANUAL
 2) 7F26 PSEU SECT 2
 H. Do a Test of the Alternate Sensors (Fig. 502)
 S 745-290
 (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
____ tilt position sensors and the gear lever switch.
 ~.......................................................................... | BIT TABLE (Alternate) | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | L BODY GR | E/099/272/00 | 11 | NOT DOWN | GEAR DOWN | | DOWN/LOCK ALT | | | | | ............................................................................ | L WING GR | E/099/272/00 | 12 | NOT DOWN | GEAR DOWN | | DOWN/LOCK ALT | | | | | ............................................................................ | R WING GR | E/099/272/00 | 13 | NOT DOWN | GEAR DOWN | | DOWN/LOCK ALT | | | | | ............................................................................ | R BODY GR | E/099/272/00 | 14 | NOT DOWN | GEAR DOWN | | DOWN/LOCK ALT | | | | | ............................................................................ | L BODY GR | E/099/272/00 | 15 | NOT UP | GEAR UP | | UP/LOCK ALT | | | | | ............................................................................ | L WING GR | E/099/272/00 | 16 | NOT UP | GEAR UP | | UP/LOCK ALT | | | | | ............................................................................ | R WING GR | E/099/272/00 | 17 | NOT UP | GEAR UP | | UP/LOCK ALT | | | | |
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747-400
MAINTENANCE MANUAL

 ~.......................................................................... | BIT TABLE (Alternate) | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | R BODY GR | E/099/272/00 | 18 | NOT UP | GEAR UP | | UP/LOCK ALT | | | | | ............................................................................ | L BODY GR | E/099/272/00 | 19 | NOT TILTED | TILTED | | TILT ALT | | | | | ............................................................................ | L WING GR | E/099/272/00 | 20 | NOT TILTED | TILTED | | TILT ALT | | | | | ............................................................................ | R WING GR | E/099/272/00 | 22 | NOT TILTED | TILTED | | TILT ALT | | | | | ............................................................................ | R BODY GR | E/099/272/00 | 23 | NOT TILTED | TILTED | | TILT ALT | | | | | ............................................................................ | L BODY GR | E/099/272/00 | 24 | NOT OPEN | DOOR OPEN | | DOOR OPEN ALT | | | | | ............................................................................ | L WING GR | E/099/272/00 | 25 | NOT OPEN | DOOR OPEN | | DOOR OPEN ALT | | | | | ............................................................................ | NOSE GR DOOR | E/099/272/00 | 26 | NOT OPEN | DOOR OPEN | | OPEN ALT | | | | | ............................................................................ | R WING GR | E/099/272/00 | 27 | NOT OPEN | DOOR OPEN | | DOOR OPEN ALT | | | | | ............................................................................ | R BODY GR DOOR | E/099/272/00 | 28 | NOT OPEN | DOOR OPEN | | OPEN ALT | | | | |
　
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