February 29, 2000

National Transportation Safety Board (NTSB)
Attn: Mr. James E. Hall, Chairman
490 L'Enfant Plaza, S.W.
Washington, DC 20594


Dear Chairman Hall:

The members of the American Society of Safety Engineers (ASSE) have been monitoring the ongoing investigation of aircraft stabilizers with great interest. The purpose of this letter is to follow-up on a May, 1969 article faxed to your attention on 2/15/2000 by ASSE staff.

The American Society of Safety Engineers (ASSE), is the oldest and largest Society of Safety Professionals in the world. Founded in 1911, ASSE represents in excess of 32,000 dedicated safety professionals. Included in this membership are Certified Safety Professionals, Professional Engineers, ergonomists, academicians, fire protection engineers, system safety experts, industrial hygienists, physicians, occupational nurses, and an impressive collection of other disciplines, skills, and backgrounds. We pride ourselves on our dedication to excellence, expertise, and commitment to the protection of people, property, and environment on a world?wide basis.

Enclosed is an article written by one of our members, David MacCollum, in May, 1969, which should be of interest to you and NTSB staff. The article is titled: Reliability as a Quantitative Safety Factor, and you will notice that safety issues addressing aircraft stabilizers are specifically addressed beginning on Page 10 of the article. We hope that this article will be of assistance of NTSB during your ongoing investigation. We suggest the NTSB may wish to conduct a literature search of articles that addressed stabilizer issues for the time period of 1968-1970. We could not find any related articles, however, several of our members with extensive years of experience have commented that the issue of safety and aircraft stabilizers was of concern during this time period. While technology has changed since 1969, the basic tenets of safety management have not. Studies and articles from this time period may help shed light on what actually happened regarding aircraft and stabilizer safety issues.

Finally, ASSE is pleased to offer its resources and expertise if you should require any assistance. We thank you for your attention to this matter, and if you should have any questions or concerns please feel free to call on the Society.

Sincerely yours,

Frank H. Perry, CSP, PE
Society President, 1999-2000

Copy To:  ASSE Board of Directors
                   ASSE Council on Professional Affairs
                   ASSE Governmental Affairs Committee
                   ASSE Contact List


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