PPRuNe Forums - View Single Post - NTSB to probe Fedex/Southwest close encounter at Austin
Old 5th Feb 2023, 23:09
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DIBO
 
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Originally Posted by MLHeliwrench
it would be interesting to line the timing up with the ATC inquiry ‘are you rolling?’ As well as the SWA response. If SWA 737 was only 5 seconds lining up before rolling maybe FedEx would of landed.
IF, big if, the LiveATC archives are perfectly clock synchronized, so that each half hour archive starts exactly on the hour or in this case on H+30:00, then the events were:

UPDATE: it seems LiveATC archives are NOT perfectly clock synchronized, so an up-to-the second synhro with FR24 is unreliable

* 12:39:06 SWA "cleared for takeoff, copy the traffic" doing 9kts almost at the end of the eastward turn towards the holding point line
* 12:39:21 FDX "TWR confirm cleared to land" about 2.5nm out
* 12:39:52 SWA FR24 recording 3kts in the middle of the pianokeys
* 12:40:02 TWR "SW confirm on the roll"
* 12:40:05 SWA "rolling now"
* 12:40:19 SWA FR24 recording 19kts at the bottom of the 'L' (of 18L)
* 12:40:21 FDX FR24 recording 139kts over the middle of the approachlights (520ft from the pianokeys)
* 12:40:24 FDX "SW abort "
* 12:40:25 SWA FR24 recording 48kts about 400ft more down the rwy
* 12:40:27 FDX "Fedex is on the go" at 138kts just in front of the rwy at 100ft (unadjusted)
* 12:40:31 SWA FR24 recording 74kts 200ft beyond the aiming point
* 12:40:33 FDX FR24 recording 140kts over the aiming point at 75ft (unadjusted)
* 12:40:37 TWR "SW708 roger, turn right when able" <<=== makes me believe that TWR interpreted the "SW abort" call as coming from the SWA
* 12:40:42 SWA "Negative" doing 119kts down the rwy

Last edited by DIBO; 6th Feb 2023 at 21:17. Reason: adding some more timestamp events
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