26th Congress of International Council of the Aeronautical Sciences
including the 8th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference
14 - 19 September 2008, Anchorage, Alaska, USA
Paper ICAS 2008-9.4.5 (AIAA 2008-8964 )
RECENT DEVELOPMENTS OF MSG-3 (MAINTANANCE STEERING GROUP) GUIDANCE FOR THE CONTINUED AIRWORTHINESS OF LIGHTNING/HIRF PROTECTION AND BENFITS TO NEW AIRPLANE DESIGN
G. J. Sweers, J. P. Fielding*
The Boeing Company, USA; *Cranfield Univ., UK
Keywords: Maintenance, continued airworthiness, MSG-3, lightning
Maintenance guidelines for creation of
scheduled aircraft maintenance programs
contained in the Air Transport Association
(ATA) MSG-3 document have been recently
revised (2007), and require new aircraft designs
to follow a significantly revised methodology for
lightning/HIRF (L/HIRF) protection. With the
conclusion of an ATA Task Force in July of
2005 [8], a new lightning/HIRF protection
maintenance analysis methodology was
harmonized among aircraft manufacturers and
ATA members. Once adopted by the
International MRB Policy Board (IMRBPB)
consisting of ATA, FAA, CAA and EASA
representatives, this methodology was included
in a revision to the MSG-3 document guidelines
in MSG-3 Revision 2007.1[1]. Along with the
methodology revision, specific written guidance
contained within the MSG-3 document has also
been modified and requires interpretation for
new transport category aircraft designers. This
document change provided the industry an
opportunity to clarify and enhance significant
policy guidance on the following important
topics for which this paper will address:
1. Implications of an Engineering Validation
Program to the MSG-3 analysis
2. Lightning/HIRF protection components
identification process
3. Lightning/HIRF protection susceptibility to
Environmental Deterioration and Accidental
Damage (ED/AD)
4. MSG-3 analysis of “common cause”
degradation
5. Specific criteria for “No dedicated
maintenance” of protection components
6. The definition of new terms such as: L/HIRF
Protection System, L/HIRF Protection
Component, L/HIRF Protection
Characteristics.
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