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Some of the damage found to tubing and components inside the tank has raised the issue as to how
often a fuel tank should be entered. The consensus of the Boeing Working Group is that the
number of planned fuel tank entries should be as few as possible to prevent inadvertent damage to
fuel tank systems and components, and to limit the exposure of maintenance personnel to this
hazardous and difficult work environment.
This program has identified areas where airworthiness enhancements can be made. Boeing and its
operators are committed to enhancing fuel system safety and agree to make changes that will
5.0 Boeing Working Group Report (continued)
Page 54 Industry AFFSP Report August 4, 2000
improve margins in product safety. Service bulletins for the proposed changes mentioned earlier
are being issued to enhance the design margins of the affected parts. Many of these service
bulletins have already been released.
In conjunction with the other airplane working groups, Boeing is determining what should be done
to enhance airplane maintenance for fuel systems. The current plan is to take lessons learned from
fleet history reviews, together with information from the inspection program, and combine them to
develop a comprehensive maintenance program. This program will be implemented via the
existing MSG (maintenance steering group) process to ensure consistent industrywide acceptance.
August 4, 2000 Industry AFFSP Report Page 55
6.0 BOMBARDIER WORKING GROUP REPORT
6.1 Introduction
Bombardier Aerospace joined the Aircraft Fuel System Safety Program (AFSSP) in late 1997
through its Regional Aircraft group. Bombardier Aerospace Regional Aircraft focuses on 30 to 90
passenger regional airline operations through its fleet of de Havilland Dash 7 (DHC-7) and Dash 8
(DHC-8-100, -200, -300, and -400) turboprop aircraft and Canadair Regional Jet CRJ 100, 200,
700, and 900 turbofan aircraft. All of the above aircraft are presently in production except for the
CRJ 900—which was only recently launched—and the Dash 7.
Bombardier Aerospace also produces business aircraft through its Learjet, de Havilland, and
Canadair facilities, and fire-fighting aircraft through its Amphibious Aircraft department. These
aircraft were not included in the AFSSP because they are not operated under FAR Part 121. The
certification authority for the Dash and CRJ aircraft is Transport Canada (TC), which has
participated in the AFSSP meetings and worked with the Bombardier Working Group.
Bombardier Aerospace, Shorts division, is the type certificate holder for the Shorts 330 and 360
regional aircraft, which are out of production. These aircraft were subject to a separate review with
the CAA and were not intended participants in the Bombardier AFSSP aircraft inspection
program. Therefore, they are not addressed in this report.
6.2 Scope
Bombardier Aerospace joined the AFSSP soon after its inception and has participated fully in this
voluntary industry program. Bombardier has attended and hosted meetings and has performed a
sampling inspection of its regional jetliner fleet worldwide.
6.2.1 Additional Activities
Bombardier Aerospace has been involved in fuel system safety enhancement initiatives concurrent
with the AFSSP. Bombardier participated in the Aviation Rulemaking Advisory Committee
(ARAC) Fuel Tank Harmonization Working Group (FTHWG) and worked with the industry to
provide comments on the FAA’s Notice of Proposed Rule Making (NPRM) 99-18, which was
titled “Transport Airplane Fuel Tank System Design Review, Flammability Reduction, and
Maintenance and Inspection Requirements.”
During the program, an operator mentioned a previous case of conduit chafing inside the tanks.
This led to Service Bulletin A601R-28-036 to inspect the conduits and install a clamp. Isolated
findings of minor chafing were encountered and addressed during compliance with this bulletin.
6.3 Working Group Teams
The Bombardier Working Group is made up of several internal departments and several airlines,
as described immediately below.
6.0 Bombardier Working Group Report (continued)
Page 56 Industry AFFSP Report August 4, 2000
6.3.1 Team Composition
The following chart shows the Bombardier Working Group composition:
Figure 6-1: Bombardier Working Group
6.3.2 Team Activities
Communication between the various groups was maintained through regular meetings, which
ranged from gatherings of CRJ Working Group members; CRJ and Dash groups; CRJ, Dash,
Transport Canada, and airlines; and Bombardier participation in the AFSSP meetings.
6.4 Working Group Approach
The Bombardier Working Group worked in close cooperation with the industry as it defined and
　
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