747-400 AMM 飞机维护手册 STANDARD PRACTICES - AIRFRAME(8)

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 C.  Raised or half tube pressure seals are installed to prevent water from freezing around cables. For throttle control cables (Ref par. 4, 5). For aileron, flaps and speed brake control cables air pressure seal (Ref par. 6 and 7).
 TASK 20-11-04-004-001
 2.  Remove Control Cable Air Pressure Seal (Fig. 401)
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Control Cable Air Seal Installation
Figure 401

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747-400 MAINTENANCE MANUAL
 A. Procedure
 S 034-002
 (1)  
Remove two seal retaining bolts.

 S 034-003

 (2)  
Remove ball (2 pieces) from seal cover.

 S 024-004

 (3)  
If it is necessary to replace the seal plate or seal cover, do these steps:

 (a)  
Disconnect the turnbuckle adjacent to the pressure bulkhead.

 (b)  
Remove the seal cover and the seal plate from the control cable.

 

 TASK 20-11-04-404-005
 3.  Install Control Cable Air Pressure Seal (Fig. 401)_______________________________________
 A. Consumable Materials
 (1)  
D00015 Grease - BMS 3-24

 B.
Procedure

 S 434-006
 (1) If you remove the seal plate or seal cover, do these steps:
 (a)  
Replace them on the control cable.

 (b)  
Adjust the control cable as told in the system rigging instructions.

 S 644-008
 (2)  Apply grease to the cable for full length of travel within seal.
 NOTE:____Do not fill seal with grease. Do not apply cleaning solvents or grease to stainless steel cables (CRES).
 S 434-034
 (3)  
Install the gasket to the pressure bulkhead.

 S 434-009

 (4)  
Connect the two ball halves on cable between seal cover and seal plate.

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747-400
MAINTENANCE MANUAL

 S 424-035
 (5)  
Loosely install the seal retaining bolts and washer.

 S 434-036

 (6)  
Adjust the seal to give minimum cable deflection and tighten the seal retaining bolts.

 S 214-037

 (7)  
Make sure the cable pressure seals are correctly adjusted after installation.

 (a)  
Make sure there is no cable deflection.

 (b)  
Make sure the cable moves freely.

 

 TASK 20-11-04-004-012
 4. Remove Engine Throttle Control Cable Air Pressure Seal (Fig. 402)
______________________________________________________
 A. Procedure
 S 034-013
 (1)  
Disconnect throttle control cable at turnbuckle.

 S 034-014

 (2)  
Remove pulley.

 

Installation of Engine Thottle Control Cable Air Pressure Seal
Figure 402

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747-400 MAINTENANCE MANUAL
 S 024-015
 (3)  Remove engine throttle air pressure seal.
 (a)  
Remove two seal retainer bolts and pulley shield.

 (b)  
Remove seal cover.

 (c)  
Remove shrunk sleeving.

 (d)  
Remove two half tubes.

 TASK 20-11-04-404-016
 5. Install Engine Throttle Control Cable Air Pressure Seal (Fig. 402)
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