board meeting dca04ma045 flight data recorder (fdr) l-3 communications fairchild f-800 recorded...
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![Page 1: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/1.jpg)
Board Meeting DCA04MA045Board Meeting DCA04MA045
Flight Data Recorder (FDR)Flight Data Recorder (FDR)
• L-3 Communications Fairchild F-800• Recorded about 25 hours of data• 56 parameters verified• Left aileron surface position data
invalid
![Page 2: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/2.jpg)
Board Meeting DCA04MA045Board Meeting DCA04MA045
14 Code of Federal Regulations Part 121.344
14 Code of Federal Regulations Part 121.344
• Required 34 parameters
• Included left and right aileron surface positions
![Page 3: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/3.jpg)
Board Meeting DCA04MA045Board Meeting DCA04MA045
Executive Airlines’ ActionsExecutive Airlines’ Actions
• Modified its 41 ATR-72s• Supplemental type certificate • Two aileron surface position sensors
added to each airplane• 41 ATR-72s = 82 sensors on its ATR-72
fleet• String potentiometers
![Page 4: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/4.jpg)
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String PotentiometerString Potentiometer
• String attached to aileron linkage
• Aileron movement detected by sensor
• Sensor produces voltage input
• Voltage converted to digital value
![Page 5: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/5.jpg)
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FDR Functional ChecksFDR Functional Checks
• Only means to detect flight control sensor failures
• Performed every 3,000 flight cycles• Last performed on airplane on January 3,
2003• No problems noted with aileron surface
position data
![Page 6: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/6.jpg)
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Executive AirlinesExecutive Airlines
• In last 3 1/2 years, replaced 38 aileron surface position sensors
• 46 percent failure rate
• Failures typically caused by wear or weather
![Page 7: Board Meeting DCA04MA045 Flight Data Recorder (FDR) L-3 Communications Fairchild F-800 Recorded about 25 hours of data 56 parameters verified Left aileron](https://reader036.vdocuments.site/reader036/viewer/2022062713/56649f575503460f94c7c9fd/html5/thumbnails/7.jpg)
Board Meeting DCA04MA045Board Meeting DCA04MA045