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Multiple-failure Accidents
Barriers are critical design elements for safety because they offer
double benefi ts, the author says. They can prevent a failure or
can lessen the consequences if a failure occurs. Moreover, they
offer some protection against multiple failures that are diffi cult to
anticipate because there are so many potential combinations.
B-737 Enters Excessive Descent
Rate During Coupled ILS Approach
The Australian Transport Safety Bureau report said that
a number of factors led the fl ight crew to believe that the
instrument landing system was usable although a notice to
airmen advised that the glideslope was being tested and was
not to be used for navigation.
Flight Safety Foundation
For Everyone Concerned With the Safety of Flight
www.fl ightsafety.org
OFFICERS AND STAFF
Chairman, Board of Governors Amb. Edward W. Stimpson
President and CEO Stuart Matthews
Executive Vice President Robert H. Vandel
General Counsel and Secretary Kenneth P. Quinn, Esq.
Treasurer David J. Barger
ADMINISTRATIVE
Manager, Support Services Linda Crowley Horger
FINANCIAL
Director of Finance
and Administration Juan G. Gonzalez
Accountant Millicent Wheeler
MEMBERSHIP
Director, Membership
and Development Ann Hill
Membership Services
Coordinator Ahlam Wahdan
Membership Services
Coordinator Namratha Apparao
PUBLICATIONS
Director of Publications Roger Rozelle
Senior Editor Mark Lacagnina
Senior Editor Wayne Rosenkrans
Senior Editor Linda Werfelman
Associate Editor Rick Darby
Web and Print
Production Coordinator Karen K. Ehrlich
Production Designer Ann L. Mullikin
Production Specialist Susan D. Reed
Librarian, Jerry Lederer
Aviation Safety Library Patricia Setze
TECHNICAL
Director of Technical Programs James M. Burin
Technical Programs Specialist Joanne Anderson
Managing Director of
Internal Evaluation Programs Louis A. Sorrentino III
Q-Star Program Administrator Robert Feeler
Manager, Data Systems
and Analysis Robert Dodd, Ph.D.
Manager of Aviation
Safety Audits Darol V. Holsman
Founder Jerome Lederer
1902–2004
Flight Safety Digest
Vol. 24 No. 6 June 2005
In This Issue
Flight Safety Foundation is an international membership organization
dedicated to the continuous improvement of aviation safety. Nonprofi t
and independent, the Foundation was launched offi cially in 1947 in
response to the aviation industry’s need for a neutral clearinghouse to
disseminate objective safety information, and for a credible and knowledgeable
body that would identify threats to safety, analyze the problems
and recommend practical solutions to them. Since its beginning, the
Foundation has acted in the public interest to produce positive infl uence
on aviation safety. Today, the Foundation provides leadership to more
than 900 member organizations in more than 150 countries.
42LIBRARY
STATS
37
BRIEFS
47
1
Cover: FSF photo illustration (photos: Copyright © 2005 iStockphoto)
31
FLIGHT SAFETY FOUNDATION • FLIGHT SAFETY DIGEST • JUNE 2005 1
‘Paperless Cockpit’ Promises
Advances in Safety, Effi ciency
Electronic flight bags are eliminating considerable paper from the flight deck while offering the
flight crew a wide array of technological assistance. Nevertheless, these still-changing tools
require more than casual understanding before flight crews can replace paper with electronics.
— FSF EDITORIAL STAFF
Electronic fl ight bags (EFBs) are customizable
electronic devices that
increasingly are in use on fl ight decks
to allow fl ight crewmembers to perform
a variety of tasks that previously required
reference books, aeronautical charts and mathematical
calculations. Some EFBs are no more
than off-the-shelf portable computers with fl ightmanagement
applications; others — just beginning
to be installed in aircraft — are sophisticated
purpose-built systems.
One of the primary factors in the development
of EFBs has been the reduction — and in some
airplanes, the near-elimination — of paper reference
materials on the fl ight deck. Nevertheless,
advocates of EFBs say that among the benefi ts
of the transition from paper to electronics are
enhanced safety, increased effi ciency and lower
operating costs.
The U.S. Federal Aviation Administration (FAA),
which in 2003 published Advisory Circular
(AC) 120-76A, Guidelines for the Certifi cation,
Airworthiness and Operational Approval of
　
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