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23-61-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 284-021
(7) Examine the installation of the discharger base:
(a) Make sure that there are no cracks in the sealant, BMS 5-95. 1) If you find a crack, fill the crack with sealant BMS 5-95.
S 764-053
WARNING:_______MAKE SURE THAT THE BONDING METER IS RESISTANT TO EXPLOSION. IF NOT, IT IS POSSIBLE THAT AN EXPLOSION OR FIRE CAN OCCUR.
(8) Use a bonding meter to do a check of the electrical bond between the discharger base and the airplane surface (SWPM 20-20-00).
(a) The resistance for new discharger bases must not be more than the values that follow. 1) .01 ohms for dischargers installed on metal panels. 2) .10 ohms for dischargers installed on fiberglass laminate
or composite panels with a cover of aluminum flame spray. a) Also dischargers installed on aluminum-covered glass fabric. 3) 1.0 ohm for dischargers installed on composite panels without a cover of aluminum.
NOTE: A resistance of more than these values can cause
____ damage if hit by lightning.
TASK 23-61-00-424-022
4. Static Discharger Rod Installation
__________________________________
A. General
(1) Before you install the new static discharger rod, do a check of the condition of the rod. Tips that show erosion are satisfactory if the tip shows and the resistant check is good.
B. Equipment
(1) 1863 Megohmmeter (or equivalent)
Quadtech Inc. (Vendor Code OPK96)
100 Nickerson Ave., Marlborough, MA 01752
C. References
(1) SRM 51-70-14, Structural Repair Manual
D. Access
(1) Location Zone
300 Left Wing
400 Right Wing
700 Empennage
E. Procedure
S 424-030
(1) Install the discharger rod:
(a)
Put the static discharger rod on the static discharger base.
(b)
Hold the discharger rod in the correct position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(c) Tighten the setscrew.
S 764-052
WARNING:_______USE THE PRECAUTIONS THAT FOLLOW WHEN YOU USE A MEGOHMMETER. IF YOU DO NOT USE PRECAUTIONS, THEN IT IS POSSIBLE THAT AN EXPLOSION OR FIRE CAN OCCUR.
(2) Use these precautions for possible fuel vapors when you use a megohmmeter:
(a)
Use the Quadtech 1863 megohmmeter or equivalent meter with a 500 VDC test voltage and a maximum 5 milliampere short circuit current.
(b)
Do not use a megohmmeter at these locations: 1) Area adjacent to or below a wing fuel tank vent, five foot
(1.524 meters) diameter column, from vent to ground.
2) Zero to 18 inches (457 mm) above the ground in the area around the airplane.
(c) Make sure that: 1) Area is well ventilated. 2) Metal workstands are grounded. 3) Megohmmeter is plugged into a grounded receptacle. 4) Megohmmeter is insulated from metal work stands.
S 764-045
(3) Use a megohmmeter to measure the resistance between the discharger rod and the base:
NOTE: A good electrical bond between the discharger rod and the
____ megohmmeter is necessary for a correct measure of resistance.
(a)
Set the megohmmeter to 500 VDC test voltage.
(b)
Use a wet paper towel or cotton cloth to make a good connection with the end of the discharger rod.
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