51-21-61
ALL ú ú B01 Page 703 ú Nov 12/01
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A
737-300/400/500MAINTENANCE MANUAL
CONDUCTIVE COATING FOR EXTERIOR FIBERGLASS AND KEVLAR - CLEANING/PAINTING
_________________________________________________________________________
1. General_______
A. This procedure contains one task. The task is to apply a layer of the conductive coating on the external fiberglass and kevlar surfaces.
B. It is necessary to apply a conductive coating on all external fiberglass and kevlar surfaces (except those with BMS 8-278 Thorstrand on the surface).
C. For radome see (AMM 53-52-00).
TASK 51-21-71-377-001-B00
2. Apply the Conductive Coating (Fig. 701)____________________________
A. Special Tools and Equipment
(1)
Multimeter - Commercially available
(2)
F70328-1 - Probe, Film Resistance Measuring
(for fasteners)
(3)
ST895A-3 - Probe, Surface Resistivity Measuring
B. Consumable Materials
(1)
B00380 Abrasive Paper - 240 grit (Minimum grit number)
(2)
Bare Metal Strips (two identical)
(3)
C00767 Conductive Coating - BMS 10-21, Type III
(AMM 20-30-41)
(4)
G00033 - Cheesecloth
(5)
B00135 - Solvent - Aliphatic Naphtha
(6)
G00351 Tape - Masking
(7)
Polyethlene Film (AMM 20-30-51)
C. References
(1) AMM 51-21-21/701, Prepaint Cleaning and Treatment
D. Procedure
S 117-002-B00
WARNING: SOLVENTS AND PAINT MATERIALS CONTAIN POISONOUS AND FLAMMABLE
_______ INGREDIENTS. OBEY THE INDUSTRIAL HYGIENE, FIRE, AND SAFETY ORGANIZATIONS PRECAUTIONS FOR EQUIPMENT, AIR FLOW, AND OTHER PRECAUTIONS TO MAKE SURE YOU ARE SAFE. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE PRECAUTIONS.
(1) Clean and prepare the surface (AMM 51-21-21/701).
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737-300/400/500MAINTENANCE MANUAL
TAIL CONE
FLAP TRACK
LANDING GEAR DOOR
VERTICAL STABILIZER
RUDDER
TAB
ELEVATORAILERON
OUTBOARD FLAP
GRAPHITE/EPOXY INBOARD FLAP
HORIZONTAL STABILIZERKEVLAR
FIBERGLASS
WING FIXED LEADING EDGE
STRAKELET
NOSE WING-TO-BODY
RADOME FAIRINGS
Fiberglass, Kevlar and Graphite/Epoxy Areas
Figure 701
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
S 377-004-B00
(2) Refer to manufacturer's instruction to mix the conductive coatings.
S 957-006-B00
CAUTION: DO NOT PERMIT A PAINT THAT HAS METALLIC PARTICLES TO GET ON AN
_______ ANTENNA OR ITS FAIRING. THE ANTENNA PERFORMANCE WILL DECREASE IF THERE ARE METALLIC PARTICLES ON ITS SURFACES OR FAIRING.
(3) Apply masking tape to all areas that the conductive coating must not be applied.
NOTE: Use polyethlene sheets for large areas.
____
S 377-007-B00
(4)
Spray or apply the conductive coating with a brush until you get a dry film thickness of 0.6 (|0.2) mil.
S 377-008-B00
(5)
Let the conductive coating cure:
(a)
Permit the surface to dry in countersunk areas for at least 20 minutes before you install the fasteners.
(b)
Permit the surface to dry as shown in Fig. 702 before you do the resistance measurements.
S 757-009-B00
(6) Measure the conductivity of the antistatic paint surface as follows:
(a) Tightly touch the surface with the surface resistivity-measurement probe.
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