(Continued)
Zone Area
196 Above Wing, Wing-To-Body Fairing - Right
E. Prepare for the Electrical Resistance Check
SUBTASK 53-51-01-200-001
(1) Identify the fastener locations on each panel that an electrical bond is necessary:
NOTE: There are usually four fasteners per panel with electrical bonds. It is recommended to
examine the panel at the corners first. Usually the locations are at or near the corners
of the panel. Panel repairs can change the locations of the electrical bonds. It is
necessary to examine all the fastener holes to identify locations with an electrical
bond.
(a) Examine the area around each fastener hole:
1) Locations that have an electrical bond have an abraded area in the panel that
surrounds the fastener hole Figure 601.
SUBTASK 53-51-01-211-001
(2) Do these steps if the electrical bond locations are not identified after the visual inspection:
(a) Remove one fastener and one dimpled washer if installed, from the panel.
NOTE: There are usually four fasteners per panel with electrical bonds. It is
recommended to examine the panel at the corners first. Usually the locations are
at or near the corners of the panel. Panel repairs can change the locations of the
electrical bonds. It is necessary to examine all the fastener holes to identify
locations with an electrical bond.
(b) Examine the area around the fastener hole:
1) Locations that have an electrical bond have an abraded area in the panel that
surrounds the fastener hole Figure 601.
(c) Examine the countersunk area of the fastener hole:
1) Examine the countersunk area of the panel below the dimpled washer if installed.
2) The countersunk area for each electrically bonded fastener hole will have a coating,
C00767 or Bonderite M-CR 600 Aero coating, C00862.
NOTE: Non-electrical bonding locations do not have coatings in the countersunk
hole.
(d) Examine the countersunk mating surface between the dimpled washer if installed, and
the panel: Figure 601.
1) Make sure that the surfaces without an electrical bond between the dimpled washer
and the panel are free from contamination.
2) Make sure that the surfaces with an electrical bond between the dimpled washer
and the panel are free from contamination, primer, or paint.
(e) Re-install the fastener and dimpled washer if the location is a designated electrical bond.
(f) Do not re-install the dimpled washer if the location is not a designated electrical bond.
(g) Do the steps again to find all the designated bond locations.
SUBTASK 53-51-01-000-001
(3) If installed, remove the fasteners and dimpled washers that are in a designated electrical bond
location.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-51-01
Page 602
D633A101-ILF Feb 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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