Re-assessment of service life by comparative specimen tests

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The paper starts with a general discussion on various aspects of life re-assessment. Specific attention is paid to the possibility of re-assesgrnent by means of comparative fatigue tests on specimens. As an illustration of this method, the paper gives a description of the life-re-assessment procedures applied by the Royal Netherlands Airforce for their NF 5A/B aircraft. Paper presented at the Xth ICAF-Symposium, 16-18 May 1979, Brussels, Belgium.