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Lockheed - Expanded requirements for the cleaning of and
prevention of contamination will be included in the revision to the
SWPM
[COMMENT 1 directed at Boeing] Once again contamination only
[COMMENT 2 directed at Boeing] The ATSRAC is well aware that
materials used in airplane manufacturing comply with federal
regulations at the time of certification. However, service experience,
as illustrated by the intrusive inspections, show that some original
material should be replaced with materials meeting a more current
flammability standard. This is the basis for this series of
recommendations that design modifications be considered to
eliminate non-fire retardant materials. Boeing’s comments are non
responsive to the recommendations.
OWNER REMARKS: OEM P3
As stated previously, the OEMs are responsive to the
recommendation in our support of the prompt removal of flammable
contaminants. We recommend that operators do so and provide
effective procedures for doing so. However, we do not support the
identification and removal of materials which meet flammability
requirements and do not degrade the operational safety of the
airplane. We do not support the statement that the intrusive
inspections indicated that some original materials should be replaced
with materials meeting later flammability standards. The OEMs
could not locate this conclusion or the recommendation within the
IIWG report.
6b1 OEM Accelerate removal of flammable materials. Ensure separation of
wire bundles from flammable materials
Boeing - Prevention of contamination, and cleaning of noted
contamination on the exterior of wiring will be included in the
Boeing SWPM. Additional guidelines for the removal of
accumulations of contamination are contained within the specific
AMM chapter applicable to the system or zone under review
Airbus - The results of the ongoing studies aimed at identifying and
eliminating the use of flammable materials in the flight deck and E/E
8 April 19 2002 49
bay areas, will determine the Airbus required action. Moisture
contamination prevention is presently taken into consideration during
the design of the electrical system. Airbus will include in the ESPM
guidance and practices to maintain the design provisions for the
prevention of moisture contamination to wiring
Lockheed - Expanded requirements for the cleaning of and
prevention of contamination will be included in the revision to the
SWPM
[COMMENT 1directed at Boeing] Once again contamination only
[COMMENT 2 directed at Boeing] The ATSRAC is well aware that
materials used in airplane manufacturing comply with federal
regulations at the time of certification. However, service experience,
as illustrated by the intrusive inspections, show that some original
material should be replaced with materials meeting a more current
flammability standard. This is the basis for this series of
recommendations that design modifications be considered to
eliminate non-fire retardant materials. Boeing’s comments are non
responsive to the recommendations.
OWNER REMARKS: OEM P3
As stated previously, the OEMs are responsive to the
recommendation in our support of the prompt removal of flammable
contaminants and provide effective procedures for doing so.
However, we do not support the identification and removal of
materials that meet flammability requirements and do not degrade the
operational safety of the airplane. We do not support the statement
that the intrusive inspections indicated that some original materials
should be replaced with materials meeting later flammability
standards. The OEMs could not locate this conclusion or the
recommendation within the IIWG report.
6c1 OEM Consider design modification to minimize potential for
contamination.
Boeing - Potential sources of contamination of airplane wiring are
identified during the design and development of the airplane, and
appropriate protection in the form of drip or heat shields are included
to minimize the effects of contamination. When unanticipated
sources of contamination are identified during service operation,
additional protection is specified and available to operators through a
service letter or service bulletin. In the case of general protection of
wiring during unrelated maintenance, Boeing will be providing
protection guidelines in an upcoming revision to the SWPM
Airbus - Potential sources of contamination of airplane wiring are
identified during the design and development of the airplane, and
appropriate protection in the form of drip or heat shields are included
to minimize the effects of contamination. If in-service experience
　
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