32-61-00
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 ú  01  Page 510
 ú  Jun 10/96 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
F82880
A
747-400 MAINTENANCE MANUAL
 S 495-092
 WARNING: USE THE PROCEDURE IN AMM 32-00-30/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4)  
Install the door locks for the nose and main landing gear (AMM 32-00-30/201).

 S 865-139

 (5)  
Make sure the ground release handles for the main landing gear are in the DOORS OPEN position.

 S 865-140

 (6)  
Make sure the ground release handles for the nose landing gear are in the DOORS OPEN position.

 S 915-012

 (7)  
Supply electrical power (AMM 24-22-00/201).

 S 865-013

 (8)  
Move the landing gear lever to the DN position.

 S 865-014

 (9)  
Make sure these circuit breakers are closed:

 (a)  
P7 Overhead Circuit Breaker Panel
 1) 7F22 LANDING GEAR DSP & CONT PRI
 2) 7F23 LANDING GEAR DSP & CONT ALTN
 3) 7F25 PSEU SECT 1
 4) 7F26 PSEU SECT 2
 5) 7F24 LANDING GEAR LEVER LOCK

 S 865-015
 (10)
 Prepare the CMC for the test:

 (a)  
Push the MENU key on the CDU.

 (b)  
Push the line-select key, adjacent to the CMC display.

 (c)  
Push the line-select key, adjacent to the OTHER FUNCTIONS display.

 (d)  
Push the line-select key, adjacent to the INPUT MONITORING display.

 (e)  
Push the CDU keys E/070/270/00, then push key 1L.

 (f)  
Push the NEXT PAGE key.

 (g)  
Push the CDU keys E/070/271/00.

 (h)  
Push the NEXT PAGE key.

 (i)  
Push the CDU keys E/070/272/00.

 (j)  
Push the NEXT PAGE key.

 (k)  
Push the CDU keys E/070/273/00.

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

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 32-61-00
 ALL  ú ú 01 Page 511 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 215-016
 (11)
 Make sure that the landing gear are not turned (steering system is centered).

 (a)  
Make sure that GEAR NOT CENTERED is not shown on the top EICAS display.

 G.  
Do a Test of the Primary Tilt Position Sensors and the Gear Lever Switch (Fig. 502)

 S 745-260
 (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 | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | L BODY GR | E/070/270/00 | 19 | NOT TILTED | TILTED | | TILT PRI | | | | | ............................................................................ | L WING GR | E/070/270/00 | 20 | NOT TILTED | TILTED | | TILT PRI | | | | | ............................................................................ | R WING GR | E/070/270/00 | 22 | NOT TILTED | TILTED | | TILT PRI | | | | | ............................................................................ | R BODY GR | E/070/270/00 | 23 | NOT TILTED | TILTED | | TILT PRI | | | | | ............................................................................ | | E/070/271/00 | 21 | AIR MODE | GND MODE | ............................................................................ | GEAR LEVER | E/070/271/00 | 25 | NOT DOWN | LEVER DOWN | 2................…...................…..........…............….............1
 S 865-141
 (2)  
Open these circuit breakers and install DO-NOT-CLOSE tags:

 (a)  
P7 Overhead Circuit Breaker Panel
　
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