Accession Number : AD0743401

Title :   An Application of Spectral Analysis to TF33-3 Engine Removal Data.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF SYSTEMS AND LOGISTICS

Personal Author(s) : Arnold,William D. ; Wendt,James C.

Report Date : 28 JAN 1972

Pagination or Media Count : 119

Abstract : The thesis investigated two areas relative to removals of TF33-3 engines number of engine removals over time follow some kind of regular pattern. That is, is there cycling present in daily, weekly, monthly or quarterly engine removal data, and, if so, at what frequencies. The second area investigated was the relationship between program activities and TF33-3 engine removals. The program activities used were sorties, flying hours and engine operating hours. Relationships were examined at various time delays between the activities and the engine removals (up to 7-1/2 years). The mathematical tools used in analysis of the engine removal data were autocovariance, spectral analysis, and cross-covariance functions. (Author)

Descriptors :   (*MAINTENANCE, PATTERN RECOGNITION), (*JET BOMBERS, TURBOFAN ENGINES), (*TURBOFAN ENGINES, MAINTENANCE), INVENTORY ANALYSIS, INVENTORY CONTROL, LEAD TIME, TIME STUDIES, STATISTICAL FUNCTIONS, POWER SPECTRA, THESES

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE