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 F.  The wedge-shaped trailing edge is fabricated of plastic glass fabric reinforced honeycomb sandwich and attaches to the aileron rear spar. Static dischargers are located nine places at the aft edge. An aluminum bus bar along three-fourths of the lower aft edge connects all discharger
 G.  Hoist attachment points on the upper chord of the forward spar at hinges No. 3 and 5 facilitate lifting the surface during removal or installation When hoist attachment points are not in use, the holes are plugged with a normal countersunk screw.
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747-400
MAINTENANCE MANUAL

Outboard Aileron
Figure 1

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 AILERON CONDUCTING STRIP - REPAIRS
__________________________________
 1.  General_______
 A. This section contains one task:
 (1)  The repair of a static discharger conducting strip at the outboard aileron.
 B. The repair of the conducting strip is as follows:
 -
Remove the static dischargers

 -
Remove the damaged conducting strip

 -Clean the new conducting strip
 -Bond the new conducting strip to the aileron
 -Install the static dischargers
 -Apply a smooth finish to the conducting strip.
 C. This procedure gives instructions to repair the items as follows:
 (1)  
The aluminum conducting strip found between the outboard aileron trailing edge and the two outboard static dischargers.

 (a)  
You must replace the conducting strip if more than half the width of the strip is damaged.

 (b)  
You can apply the approved conductive paint to the surface with BMS 10-21.

 (c)  
Do this step if less than half the width of the conducting strip is damaged.

 

 (2)  
The static discharger attaches to the outboard aileron.

 (a)  
Static dischargers also attach to the ground strap. The ground strap is bonded with adhesive to the non-conductive aileron surface of the trailing edge. Then the strap is electrically bonded to the aileron outboard rib.

 (b)  
If the electrical bond of the ground strap at the outboard rib becomes weak, these conditions will follow: 1) The static dischargers to the aileron can become

 electrically isolated. 2) The static dischargers will not operate.

 (c)  
If you find these conditions, you must repair the electrical bond of the ground strap.

 

 TASK 57-51-03-308-014
 2.  Repair the Conducting Strip ( Fig. 801)___________________________
 A. Standard Tools and Equipment
 (1)  
Meter - Bonding (20-22-01/601 Electrical Bonding)

 (2)  
Scraper - Plastic or Hardwood

 B. Consumable Materials
 (1)  
G00000 Paper - Aluminum Oxide, 240-grit or finer

 (2)  
B00000 Cleaner - Alkaline, Ridolene No. 53

 (3)  
A00966 Compound - EC-2216 Part A and Part B

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 (4)  
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261

 (5)  
G00033 Cheesecloth

 (6)  
A00247 Sealant - BMS 5-95

 (7)  
C00064 Coating - Surface treatment, MIL-C-5541 (Alodine 1200 or 1200S)

 (8)  
G00000 Aluminum Sheet - 1100-0 or 505250, 0.010 inch thick
　
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