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appropriate for the system undergoing test. Prevention of
contamination, and cleaning of noted contamination on the exterior
of wiring will be included in the Boeing SWPM
Airbus - Airbus will review "EWIS" testing requirements following
any recommendations that result from HWG 9. Prevention of
contamination, and cleaning of noted contamination on the exterior
of wiring and/or electrical components is currently included in the
ESPM
Lockheed - Specific methods for NDT & troubleshooting are
outlined in the maintenance manuals. It is the intent of LMCO to
incorporate ATA Spec. 117 practices into the MM & SWPM
[COMMENT 1 directed at Boeing] All old and not near what can be
done.
[COMMENT 2 directed at Boeing] The statement that Boeing will
include new cleaning and contamination prevention material in the
SWPM may be their only response indicating definitive action in
response to IIWG recommendations. Unfortunately this response
8 April 19 2002 36
(satisfying other recommendations of other working groups) falls
short of fully satisfactory. Though the general guidance in the
SWPM is welcome, the recommendation had intended that
manufacturers make it a practice to examine more closely modelspecific
sources of contamination and release service literature
indicating how those systems could be adjusted or modified to
minimize the potential for contamination
[COMMENT 3, also applies to 2f4] Boeing comments indicate that
existing NDT methods are called out within existing maintenance
manuals. I believe this recommendation is aimed at developing NDT
methods to detect wiring flaws and locate within a wiring run. This
also looks as if this recommendation should be assigned to FAA
Tech Center such that the work being done with some of the NDT
agencies can be tied to this recommendation.
OWNER REMARKS: OEM P3
The OEMs disagree that the inclusion of recommended procedures
for the prevention and removal of contamination is the only action to
be undertaken as a result of the IIWG recommendations. We also
disagree that this action is unsatisfactory given the fact that we
presently examine model-specific sources of contamination and
release service literature indicating how those systems could be
adjusted or modified to minimize the potential for contamination.
This service literature was reviewed by industry teams responsible
for accomplishing ATSRAC Tasks 1 and 2.
In addition, the OEMs expect that the EZAP, which contains specific
evaluation of the actual and potential sources of contamination
within a zone, would address the need for changes in maintenance or
the need for a design change to preclude the possibility of subsequent
contamination.
The Airbus ESPM currently provides guidelines for the cleaning of
EWIS components (Chapter 20-55-00) and protection (Chapter 20-
54-00) during maintenance. Any HWG7 and HWG9
recommendations will be analyzed and included if appropriate.
With regard to the recommendation concerning non-destructive
testing, the OEM response considered the use of NDT for
troubleshooting purposes. OEMs are presently evaluating the use of
diagnostic equipment utilizing various technologies to identify actual
or the potential for wiring faults.
2f4 OEM Review design practices regarding the clamping and tying of wire
bundles. Investigate use of nondestructive testing to trouble-shoot
suspect wire installations
Boeing - Review of Boeing wire clamping and bundle assembly
techniques is complete with no changes expected to those currently
specified. Presently available NDT/troubleshooting methods are
provided within the specific airplane maintenance manual chapter
appropriate for the system undergoing test
Airbus - Review of Airbus wire clamping and bundle assembly
techniques is complete with no changes expected to those currently
specified. The ESPM currently provides electrical nondestructive
testing, guidelines for the bundle correct attachment and bundle
attachment repair. Airbus will review "EWIS" testing requirements
following any recommendations that result from HWG 9
8 April 19 2002 37
Lockheed - Current design practices for clamping and bundle
assembly techniques are acceptable. No changes are planned at this
time. Specific methods for NDT & troubleshooting are outlined in
the maintenance manuals. It is the intent of LMCO to incorporate
ATA Spec. 117 practices into the MM & SWPM
[COMMENT 1 directed at Boeing] No changes
[COMMENT 2 directed at Boeing] This recommendation arose
from the finding of wire degradation caused by vibration. The
original recommendation anticipated the need for updated design
　
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