Decision diagram approach to “on condition” philosophies

F.S. NOWLAN (Manager of planning and operations analysis, United Air Lines.)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Publication date: 1 April 1972


Very often it is not possible to recognise deterioration of failure resistance in complex devices while they are installed on the aircraft and out on the airline. In such cases operational failures may occur. The failures do not all occur at the same age, however, because the resistance to failure and the environmental stress of two pieces of nominally identical equipment are not the same.


NOWLAN, F. (1972), "Decision diagram approach to “on condition” philosophies", Aircraft Engineering and Aerospace Technology, Vol. 44 No. 4, pp. 35-37.

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Copyright © 1972, MCB UP Limited

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