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regardless of the age of the airplane.
2.5.7 Geographic and Environmental Conditions
When evaluating the data collected on the items noted above, each manufacturer assessed the
inspection results with respect to determining if there were any correlation between the geographic
2.0 Overview (continued)
Page 14 Industry AFFSP Report August 4, 2000
location or operating environment of various airplane fleets. All manufacturers observed a random
distribution of inspection findings regardless of geographic location or operating environment of
inspected airplanes in their in-service fleets.
2.6 Actions and Recommendations
This inspection program’s results have shown that issues are specific to, or unique for, a particular
manufacturer or component design, specification, process, or installation. As such, each aircraft
manufacturer is developing the necessary corrective actions to address these issues.
In particular, the industry is now addressing the existing use of metal conduit to route wire through
fuel tanks. This practice will be critically evaluated to determine how present designs can be
enhanced and whether periodic inspections are desirable. Alternate wire routing methods will be
considered for new designs to alleviate the concerns associated with this practice.
Based on AFSSP findings, the industry recommends additional training for manufacturing and
maintenance personnel, and will be reviewing or modifying the existing fuel system maintenance
practices to:
! Substantiate the integrity of bonding straps through
! Long-term periodic visual / tactile inspection to verify bond integrity.
! Enhancements to existing maintenance instructions for bonding jumper maintenance
and replacement.
! Provide periodic inspection criteria for FQIS wiring and components that are more detailed
to better define conditions and items to be inspected during general tank inspections.
! Provide for the periodic in-situ inspection of fuel pumps and associated wiring, fuel lines,
and fittings.
The following items are presently part of the periodic heavy maintenance or structural inspections
that are already being conducted, so no change to existing practices is recommended.
! Inspection for foreign object debris.
! General tank condition.
While the AFSSP inspection program has confirmed that manufacturers’ standards for fuel tank
bonding are effective and robust in service, it has also highlighted the fact that these standards
vary. In addition to the bonding inspections noted above, therefore, the industry recommends that
groups such as the SAE or IEEE develop uniform standards or processes for
! Fuel tank bonding requirements and test techniques.
! Bonding jumpers used in fuel tanks.
As a final note, the AFSSP inspection program did not require the removal and teardown of fuel
system components for a detailed inspection of individual pieces or parts. However, findings
2.0 Overview (continued)
August 4, 2000 Industry AFFSP Report Page 15
outside of this inspection program have shown that improper repair or maintenance of fuel system
components can lead to safety issues.
Therefore, the industry believes it is critical to have well-documented maintenance procedures and
qualified repair stations and personnel maintaining fuel system components to ensure that design
integrity is maintained.
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August 4, 2000 Industry AFFSP Report Page 17
3.0 AIRBUS WORKING GROUP REPORT
3.1 Introduction
Airbus Industrie were active from the outset of the aviation industry initiatives to enhance fuel
system safety after the TWA 800 accident. The AFSSP is one of the many programs in which
Airbus Industrie has active participation although the events that led to these activities did not
involve its products.
At the time of the AFSSP launch, the Airbus Industrie product line covered three distinct model
families, the A300B/A300-600 /A310 widebody (W/B) family, the A319 /A320 /A321 singleaisle
(S/A) family, and the A330 /A340 long-range (L/R) family.
Within the Airbus Industrie partner system organization, the overall design, integration and
certification responsibility for fuel systems rests with the U.K partner, Airbus UK, while sub-part
manufacture, design, and installation are conducted by other partner companies within the Airbus
Industrie partner system. Technical support, continue airworthiness, and maintenance program
evolution are led by various departments located at Airbus Industrie headquarters in Toulouse.
From the outset of the AFSSP, Airbus Industrie elected to devise sample inspections for all tanks,
rather than focusing on any particular tank. This approach provided the data to assess whether
　
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