23-51-41
ALL ú ú 01 Page 407 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
STATIC DISCHARGER - DESCRIPTION AND OPERATION
_____________________________________________
1. General (Fig. 1)_______
A. Static dischargers are installed on the airplane to reduce radio receiver interference. Corona discharge, from precipitation static and engine charging, is emitted from the airplane and causes the radio interference. The precipitation static is the result of an electric charge accumulated by the airplane striking charged air and moisture particles. Static usually discharges at the wing and tail extremities and is coupled into the radio receiver antennas. The static dischargers are designed to discharge the static at points which are a critical distance away from the wing and tail extremities where there is little or no coupling into the radio receiver antennas.
B. Each discharger that is installed along the trailing edge of the wing and the tail surfaces consists of a carbon fiber tip at the end of a slender rod. The rod incorporates a resistive (conducting) material and is attached to a metal base. The base is fastened and bonded to the trailing edge surface.
C. Wing tip dischargers are smaller than wing and tail dischargers but have the same general construction and are attached in the same way.
D. The vertical fin and each wing has a tip discharger and three trailing edge dischargers. Each horizontal stabilizer has a tip discharger and two trailing edge dischargers.
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23-61-00
ALL ú ú 01 Page 1 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
TRAILING EDGE DISCHARGER (EXAMPLE) Decoupled Static Discharger Locations Figure 1
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23-61-00
ALL ú ú 01 Page 2 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
STATIC DISCHARGER - REMOVAL/INSTALLATION
________________________________________
1. General_______
A. This procedure has two tasks, a removal and an installation for the static discharger bases and the static discharger rods. The bases are attached and bonded to the airplane structure. The rods attach to the bases with one set screw.
TASK 23-61-00-024-001
2. Static Discharger Rod and Base Removal (Fig. 401)______________________________________
A. General
(1) The discharger rod is attached to the base by a bristol head screw.
B. Equipment
(1)
Grease pencil - or other nondestructive marker.
(2)
Knife - Putty, Broad Blade
(commercially available)
(3)
Tool - Sealant Removal, Hardwood or Plastic
(commercially available)
C. References
(1) SRM 51-40-02, Structural Repair Manual
D. Access
(1) Location Zone
300 Left Wing
400 Right Wing
700 Empennage
E. Procedure
S 024-046
CAUTION:_______BE CAREFUL WHEN YOU REMOVE THE DISCHARGER ROD. MAKE SURE YOU DO NOT CAUSE DAMAGE TO THE THREADS OR THE HEAD OF THE SET SCREW.
(1) Disconnect the discharger rod:
(a)
Loosen the set screw on the discharger rod.
(b)
Remove the discharger rod from the base.
S 934-037
(2) Make a mark of the position of the discharger base before you remove the base:
(a) Make sure the mark is parallel with the slipstream.
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