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Segment Information (Operating Profit By Segment And Reconciliation Of Segment Operating Profit To Earnings Before Income Taxes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 28, 2020 | Mar. 30, 2019 | Mar. 28, 2020 | Mar. 30, 2019
Segment Reporting Information |  |  |  |
Operating profit | $ 84,128 | $ 77,854 | $ 174,801 | $ 157,231
Deductions from operating profit: |  |  |  |
Interest expense | 10,251 | 9,939 | 20,483 | 19,621
Equity-based compensation expense | 890 | 1,683 | 3,271 | 3,691
Non-service pension expense | 3,598 | 4,889 | 7,199 | 9,783
Corporate and other expenses, net | 7,858 | 7,427 | 15,413 | 13,737
Earnings before income taxes | 61,531 | 53,916 | 128,435 | 110,399
Aircraft Controls |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit | 34,701 | 27,122 | 73,293 | 60,321
Space And Defense Controls |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit | 24,652 | 20,504 | 49,934 | 38,977
Industrial Systems |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit | $ 24,775 | $ 30,228 | $ 51,574 | $ 57,933

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