a) If the surface resistance of the BMS10-21, Type II, or BMS10-21, Type IV is
less than 1 megohm per square, do the steps that follow (refer to the relevant
section within this task):
<1> Remove the BMS10-21, Type II or Type IV, anti-static paint.
<2> Clean and prepare the surface.
<3> Re-apply the BMS10-21, Type II or Type IV, anti-static paint.
<4> Measure the resistance again.
<5> Repeat once if necessary.
<a> Contact Liaison engineering if resistivity requirements are not
met after second processing.
b) If the surface resistance of the BMS10-21, Type II, or BMS10-21, Type IV is
more than 100 megohms per square, do the steps that follow:
<1> Cure at 140°F (60°C) to 160°F (71°C) for 60 to 70 minutes.
<2> Measure the resistance again.
<3> If the resistance is not between 1 and 100 megohms repeat the
resolution steps.
8) Remove copper tape after completion of the measurement.
(b) To measure the surface resistance of the BMS10-21, Type II, or BMS10-21, Type IV,
using a surface resistivity measurement probe, SPL-7885, do the steps that follow:
1) Connect the digital/analog multimeter, COM-1793, to the surface resistivity
measurement probe, SPL-7885 (Figure 707).
2) Place surface resistivity measurement probe, SPL-7885, on the conductive coating.
3) Read the number for the resistance.
4) Multiply the number for resistance by 10.
NOTE: The result is the resistivity of the anti-static coating.
5) Make sure that the resistance is between 1 and 100 megohms per square.
a) If the surface resistance of the BMS10-21, Type II, or BMS10-21, Type IV is
less than 1 megohm per square, do the steps that follow (refer to the relevant
section within this task):
<1> Remove the BMS10-21, Type II or Type IV, anti-static paint.
<2> Clean and prepare the surface.
<3> Re-apply the BMS10-21, Type II or Type IV, anti-static paint.
<4> Measure the resistance again.
<5> Repeat once if necessary.
<a> Contact Liaison engineering if resistivity requirements are not
met after second processing.
b) If the surface resistance of the BMS10-21, Type II, or BMS10-21, Type IV is
more than 100 megohms, do the steps that follow:
<1> Cure at 140°F (60°C) to 160°F (71°C) for 60 to 70 minutes.
<2> Measure the resistance again.
<3> If the resistance is not between 1 and 100 megohms repeat the
resolution steps.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-52-00
Page 710
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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