27-62-06
 ALL  ú ú 01 Page 406 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 SPEED BRAKE SEQUENCE MECHANISM - REPAIRS
________________________________________
 1.  General_______
 A.  There is one task in this procedure; a repair of the speed brake sequence mechanism.
 (1)  
The repair of the sequence mechanism has these parts:

 (a)  
The removal of the sequence mechanism

 (b)  
The removal and installation of the rivets in the shear joints

 (c)  
The installation of the sequence mechanism.

 TASK 27-62-06-308-001
 2.  Speed Brake Sequence Mechanism Repair (Fig. 801)_____________________________________
 A.  Standard Tools and Equipment
 (1)  
Rivet - MS20470AD6 (optional to BACR15BB6AD)

 B.  
Consumable Materials

 (1)
C00308 Corrosion Preventive Compound, MIL-C-11796, Class 3

 C.  
References

 (1)  
27-62-06/401, Speed Brake Sequence Mechanism

 (2)  
IPC 27-62-16 Fig. 1

 D.  
Access

 (1)  
Location Zone
 136 Wing Landing Gear Wheel Well, RH

 E.  
Procedure

 S 028-002
 (1)  
Do this task: "Speed Brake Sequence Mechanism Removal" (Ref 27-62-06/401).

 S 358-003

 (2)  
Repair the sequence mechanism:

 CAUTION:_______DO NOT MAKE THE RIVET HOLES LARGER. YOU WILL CAUSE DAMAGE TO THE SEQUENCE MECHANISM.
 (a)  Remove the damaged parts of the rivets from the holes in the lever and spool.
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 27-62-06
 ALL  ú ú 01 Page 801 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
SEE A
.0625 DIA 
INSP HOLE
SHEAR JOINT 
USE ONLY 
MS20470AD6 OPT 
TO BACR15BB6AD 
ALUMINUM FOIL MARKER 
LEVER AND 
C  ASSEMBLIES SPOOL 
SEE  B 

METAL-CAL SEE C
SHEAR RIVETS
MECHANISM SEQUENCE SPEED BRAKE 
B  A 
Figure 801 Speed Brake Sequence Mechanism Repair 

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-62-06
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 (b)  
Install the new shear rivets.

 NOTE:____Install the correct rivets. See the aluminum foil marker or Fig.801 for the correct rivets.

 (c)  
Clean the inspection hole.

 (d)  
Fill the inspection hole with the corrosion preventive compound.

 S 428-004
 (3)  Do this task: "Speed Brake Sequence Mechanism Installation" (Ref 27-62-06/401).
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 27-62-06
 ALL  ú ú 01 Page 803 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 AUTOMATIC SPEED BRAKE ACTUATOR - REMOVAL/INSTALLATION
_____________________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the automatic speed brake actuator.
 (1)  
The removal procedure has these parts:

 (a)  
The removal of the ceiling panel

 (b)  
The removal of the electrical connector

 (c)  
The removal of the actuator.

 (2)  
The installation procedure has these parts:
　
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