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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. 30, 2019 | Mar. 31, 2018 | Mar. 30, 2019 | Mar. 31, 2018
Segment Reporting Information |  |  |  |
Operating profit | $ 77,854 | $ 45,407 | $ 157,231 | $ 112,834
Deductions from operating profit: |  |  |  |
Interest expense | 9,939 | 9,089 | 19,621 | 17,735
Equity-based compensation expense | 1,683 | 1,499 | 3,691 | 3,500
Non-service pension expense | 3,187 | 1,707 | 6,380 | 3,400
Corporate and other expenses, net | 7,427 | 7,443 | 13,737 | 14,696
Earnings before income taxes | 55,618 | 25,669 | 113,802 | 73,503
Aircraft Controls |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit | 27,122 | 33,793 | 60,321 | 64,836
Space And Defense Controls |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit | 20,504 | 17,042 | 38,977 | 33,515
Industrial Systems |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit | $ 30,228 | $ (5,428) | $ 57,933 | $ 14,483

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