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findings on pipes and couplings do not present any loss of the bonding function because there is
redundancy built into the system.
Based on the inspection data, Airbus will continue to use the same bonding lead material. In the
short to medium term, suppliers will be requested to enhance the manufacture quality and control
process. In the longer term, Airbus will continue to look for improved materials for in-tank use.
3.0 Airbus Working Group Report (continued)
Page 28 Industry AFFSP Report August 4, 2000
The current scheduled maintenance interval has proven to be efficient in finding and replacing
damaged leads. Furthermore, it is suspected that one of the primary cause of broken leads is tank
entries and the frequency thereof.
3.8.2 Component Bonding Exceedances
The very few findings of bonding exceedances do not require any immediate action. As mentioned
earlier, they are exceedances against a factory-build quality check standard and not a reflection of
an out-of-limit, in-service requirement.
3.8.3 General Conclusion
From this extensive and valuable industry program Airbus Industrie has shown, based on inservice
inspection data, that its original design, manufacture, and maintenance objectives for fuel
systems remain robust and functional throughout the design life of its aircraft.
August 4, 2000 Industry AFFSP Report Page 29
4.0 BAE SYSTEMS WORKING GROUP REPORT
4.1 Introduction
BAE SYSTEMS Regional Aircraft has two distinct aircraft fleets, turboprops with 19 to 64 seats
(J31, J32, J41, ATP, and HS748) and turbofans (aircraft with fanjet engines) with 70 to 112 seats
(BAe 146 and AVRO 146-RJ). There are some 1,100 aircraft worldwide flying with 230 different
customer operators. Only the AVRO 146-RJ is currently in production.
Support to these fleets is provided by BAE SYSTEMS Regional Aircraft Customer Support based
in Toulouse, France. This support is complemented by UK-based Engineering Type Design
organisations at Woodford (Turbofans) and Prestwick (Turboprops). The certificating authority for
all the aircraft types is the UK Civil Aviation Authority (CAA).
4.2 Scope
From the outset, it was decided to inspect a proportion of each aircraft family regardless of
whether it would be covered by an anticipated future regulatory activity.
In accordance with the guidelines set out by the Fuel System Safety Leadership Team, the
inspections conducted covered all fuel system aspects (i.e., aircraft wiring condition, component
condition, bonding, and so on) within the aircraft fuel tanks. The specific areas of interest and
detailed instructions were derived from design reviews of the fuel system on each type.
In the following sections, subsections are used where appropriate to reflect the slightly different
approaches used for the turbofan and turboprop fleets.
4.3 Working Group Teams
Given the relatively low ratio of aircraft per operator and the worldwide spread of the customer
base, only one operator working group (turbofan) was arranged. The inspection programme for the
rest of the aircraft types was coordinated directly with individual operators, with BAE SYSTEMS
providing on-site assistance in many cases.
4.3.1 Turbofans (BAE SYSTEMS Regional Aircraft—Woodford)
A working group was formed consisting of several BAE SYSTEMS Customer Support and
Engineering departments and a cross section of the fleet operators to develop a process and
method to gather relevant information. The members of the working group are listed below. Note
that BAE SYSTEMS Asset Management Organisation (AMO) is listed as a customer as they own
a number of jet and turboprop aircraft that are operated by various airlines on medium and longterm
leases.
4.0 BAE Systems Working Group Report (continued)
Page 30 Industry AFFSP Report August 4, 2000
Airline Aircraft type
Aer Lingus BAe 146
Air UK BAe 146
BAE SYSTEMS
Asset Management Organization (AMO)
BAe 146 and Avro 146-RJ
British European BAe 146
DAT BAe 146 and Avro 146-RJ
Eurowings BAe 146
Lufthansa City Line Avro 146-RJ
Mesaba Avro 146-RJ
TNT BAe 146
Figure 4-1: Airline Participants
BAE SYSTEMS Regional Aircraft would like to publicly thank all the operators who volunteered
aircraft for this voluntary inspection programme. They are listed below:
! DAT.
! Eurowings.
! Jersey European.
! Lufthansa City Line.
! Mesaba.
! National Jet Systems.
4.3.2 Turboprops (BAE SYSTEMS Regional Aircraft—Prestwick)
To gather sufficient information on the general condition of fuel tanks in aircraft affected by the
proposed rulemaking, BAE SYSTEMS Prestwick opted to review all the civil aircraft types within
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