(a)
Remove the two seal retaining bolts, nuts, and washers.
(b)
Remove the seal plate and the seal cover from the top and bottom surface of the pressure deck.
(c)
Cut the shrink sleeve from the seal.
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747-400 MAINTENANCE MANUAL
(d)
Remove the seal halves from the control cable.
(e)
Remove the seal from the hole in the pressure deck.
(f)
Remove the seal from the cable.
TASK 27-00-02-404-087
5. Speed Brake Raised Control Cable Air Pressure Seal Installation
_______________________________________________________________
A. Special Tools and Equipment
(1)
G12001-50 Rig Pin Kit
B.
Consumable Materials
(1)
D00015 Grease - Corrosion Preventive, BMS 3-24
C.
References
(1)
AMM 20-11-25/201, Heat Gun, Soldering Guns and/or Soldering Irons
(2)
AMM 27-62-00/501, Speed Brake Control System
(3)
AMM 53-21-02/401, Main and Upper Deck Floor
D.
Access
(1)
Location Zone
241 Passenger Cabin, Left Side
242 Passenger Cabin, Right Side
E.
Install the Speed Brake Raised Control Cable Air Pressure Seal
S 644-055
(1) Lubricate the cable with grease for the full length of the cable.
NOTE: Do not fill the tube with grease.
____
(a) Remove unwanted grease from the cable.
S 434-078
(2)
Install the air pressure seal (Fig. 401):
(a)
Push the tube through the seal plate.
(b)
Make sure the smaller gasket of the seal plate is against the spherical end of the tube.
(c)
Put the shrink sleeve on the tube.
(d)
Install the cable end through the tube assembly with the spherical end of the tube pointed down.
NOTE: A rigid wire attached to the cable end can make for
____ an easier installation.
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747-400 MAINTENANCE MANUAL
(e) (f) Install the seal halves on the top end of the tube.Make sure the lugs on the seal halves are correctly inst in the rectangular holes in the tube. alled
(3) S 434-060Apply pressure on the seal halves to set them on the tube.
(4) S 434-061Do this task to attach the shrink sleeve on the seal halves: "Heat
Gun, Soldering Guns and/or Soldering Irons" (AMM 20-11-25/201).
S 034-071
(5)
Cut the shrink sleeve to the outer end of the seal halves.
S 424-062
(6)
Set the seal in the hole of the pressure deck.
S 434-063
(7)
Set the top and bottom seal plate and seal cover to their positions.
S 434-079
(8)
Install the fasteners but do not tighten.
S 834-064
(9)
Install the rig pins SB-1 and SB-2.
S 434-065
(10)
Do this task to connect and adjust the tension of the control cables: "Adjust the speed brake cables SBA and SBB" (AMM 27-62-00/501).
S 824-066
(11)
Adjust the lower ends of the tube assemblies until cables are at the center in the holes.
S 434-080
(12)
Tighten the seal plate fasteners.
S 724-067 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 1(26)
