(c)  
Remove the cable guard (4).

 (d)  
Remove the screw that attaches the cables BC-3 and BC-4 to the cable drum (1).

 (e)  
Remove the cables BC-3 and BC-4.

 S 864-006
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A

737-300/400/500
MAINTENANCE MANUAL

SEE  A 
SEE  B 
SEE  D 
SEE  C 
FWD 
FOREFLAP 
FWD TORQUE TUBE 
A 
POINT "A" 
2. PULLEY 
BC-1(A)  BC-2(A)  1. CABLE  BC-3 
DRUM 
BC-4 
BC-1(B)  BC-2(B)  POINT "B" 
MIDFLAP 
FWD  AFTFLAP 
EXHAUST  B 
INBD  GATE 
Aftflap Actuating Mechanism Boom Cables Installation 
Figure 401 (Sheet 1)

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A
737-300/400/500MAINTENANCE MANUAL
2. PULLEY POINT "A" BC-31. CABLE
BOOM DRUM
A  CABLES
BC-4
POINT "B"
BOOM ROLLER
RIG PINS F-5 AND F-6
A G
11. CAM ROLLER 4. CABLE
C
0.42 |0.03
GUARD INCH
BC-4
3. PULLEY SEE FBOOM
CABLES BC-3
5.
 PULLEY

6.
 PULLEY

8. BOOM
9. PULLEY  INBD
SEE G BC-3
FWD SEE E
D
WASHERBC-4
SPACER BC-3 WASHER
10. CABLE  7. CABLE  CABLE SOCKET 
ADJUSTMENT  CABLE SOCKET  ADJUSTMENT 
NUT  E  NUT  F 

Aftflap Actuating Mechanism Boom Cables Installation
Figure 401 (Sheet 2)

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A
737-300/400/500MAINTENANCE MANUAL
 TASK 27-51-24-404-008
 3.  Aftflap Actuating Mechanism Boom Cables Installation (Fig. 401)____________________________________________________
 A. Special Tools and Equipment
 (1)  Rig Pins (F-5 and F-6) - 0.248 +0.000/-0.002 inch diameter, 3.7 |0.25 inches long (MS20392-3)
 NOTE: The rig pins are a part of the kit F70207-69, -78, or -83.
____
 B. Consumable Materials
 (1)  D00633 Grease - BMS 3-33 (Recommended)

FWD
A-A

Aftflap Actuating Mechanism Boom Cables Installation
Figure 401 (Sheet 3)

K78146
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 C.
D.
E.
A
737-300/400/500MAINTENANCE MANUAL
 (2)
D00013 Grease - MIL-G-23827 (Alternate)References

 (1)  
AMM 27-51-00/201, Trailing Edge Flap System

 (2)
AMM 27-51-32/401, Inboard Flap Track FairingAccess

 (1)  Location Zone
 309, 409  Wing Trailing Edge Inboard Flap and Spoilers
 (2)  Access Panels
 8403, 8404  Aftflap Clutch & Drive Mechanism (left side)
 8503, 8504  Aftflap Clutch & Drive Mechanism (right side)

Procedure
 S 424-009
 (1)  
Install the cable BC-3:

 (a)  
Make sure the aftflap is in the fully extended position.
　
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