747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(189)

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 S 864-015
 CAUTION:_______DO NOT USE THE SWITCH WORM SCREW FOR MORE ADJUSTMENT. IF YOU DO, YOU WILL PUT THE LIMIT SWITCH OUT OF POSITION. THIS CAN CAUSE DAMAGE TO THE LIMIT SWITCH.
 (6)  
Make sure the switch roller does not touch the cam surface in the free position when the stabilizer moves.

 (a)  
If a switch roller touches a cam surface,
 Replace the mounting bracket:
 1) Remove the switch assembly (Ref paragraph 2.).

 

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 2)  Install the switch assembly with a new mounting bracket (Ref. paragraph 3.).
 S 864-016
 (7)  
If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).

 S 864-017

 (8)  
If the hydraulic power is not necessary, do this task: "Remove Hydraulic Power" (AMM 29-11-00/201).

 TASK 27-41-08-004-073
 4.  Fuel Range Limit Switch Removal (Fig. 401)_______________________________
 A.  References
 (1)  
AMM 06-09-05/201, Body Section 48 Access Doors and Panels

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (4)  
AIPC 27-41-04, Fig. 3

 (5)  
SSM 28-21-03

 (6)  
WDM 28-21-25

 B.  
Access

 (1)  
Location Zone
 311 Area Aft of Pressure Bulkhead, LH

 (2)  
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door

 C.  
Procedure

 S 864-030
 (1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P180, DC Power Distribution Panel 1) 180B2, FUELING LIGHTS HOT

 (b)  
P414, Power Distribution Center - Left 1) 414F22, LIGHT FUELING

 (2)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 864-070
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 (3)  S 864-031Do this task to pressurize the hydraulic systems No. 2 and No. 3: "Supply Hydraulic Power" (AMM 29-11-00/201).
 (4)  S 864-032Hold the STAB TRIM ALTN switches to APL NOSE DN until the stabilizer stops.
 (5)  S 864-033Set the STAB TRIM 2 and 3 switches to CUTOUT.
 (6)  S 864-034Open these circuit breakers and attach DO-NOT-CLOSE tags: (a) P7, Overhead Circuit Breaker Panel 1) 7E7, L STAB TRIM S/O VLV 2) 7E20, R STAB TRIM S/O VLV
 (7)  S 864-035Do this task to release the pressure in the hydraulic systems No. 2 and No. 3: "Remove Hydraulic Power" (AMM 29-11-00/201).
 (8)  S 864-071Do this task:  "Remove Electrical Power" (AMM 24-22-00/201).
 (9)  S 014-036Open the access door 312A (AMM 06-09-05/201).
 S 034-038

 (10)
 Cut the splices to isolate the switch wires from the wire bundle (WDM 28-21-25).

 S 024-039

 (11)
 Remove the fuel switch:

 (a)
Identify the wire bundle conductors.

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 (b)  
Remove the locknut.

 (c)  
Remove the fuel switch.

 TASK 27-41-08-404-074
 5.  Fuel Range Limit Switch Installation____________________________________
　
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