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Cases › DCA20CA071 › The analyst

BOMBARDIER CL-600-2D24PSA Airlines

What the docket says, assembled. No language model is involved, so nothing on this page can be invented — every line traces to a recorder, a report page or the Board's own record.

6
timed facts
8
precedents
9
passages to ask

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passages, not paraphrases
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Every answer is a passage of the docket with the page it came from, or the words “not in the docket”. Nothing is summarised or reasoned for you — read the source.

One timeline

6 timed factsthe recorder events from the FDR report, with the transcript's warnings, callouts, the words nearest each event and the final seconds — on one clock, as printed in each report
  1. 00:34:00 ESTFDREnroutep.2
    Start of plotted data range for entire flight (Figures 1 and 2)
    see the traces at this moment ↗
  2. 00:55:00 EST to 00:56:30 ESTFDREnroute descentp.2
    Expanded scale plots (Figures 3 and 4) focusing on the large vertical acceleration excursion
    see the traces at this moment ↗
  3. 00:55:38 ESTFDREnroute descentp.2
    Turbulence event began, approximately 17 minutes before touchdown, at position N35°21'32" W83°00'25"
    see the traces at this moment ↗
  4. 00:55:58 ESTFDREnroute descentp.2
    Turbulence event ended, at position N35°22'04" W83°02'37"
    see the traces at this moment ↗
  5. 01:05 ESTFDREnroute descentp.1
    PSA Airlines flight 5634 encountered turbulence during enroute descent to McGhee Tyson Airport (KTYS)
    see the traces at this moment ↗
  6. 01:15:00 ESTFDRLanding/Approachp.2
    End of plotted data range for entire flight (Figures 1 and 2)
    see the traces at this moment ↗
FLIGHT DATA RECORDER - SPECIALISTA��S FACTUAL REPORT · 6 events extracted by claude-sonnet-5
How the Board coded the sequence
  1. Enroute-descent: Turbulence encounter

Precedents

8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded
  • DCA09CA0692009-08-04no fatalitiesmatch 98
    BOMBARDIER INC CL-600-2B19 · PINNACLE AIRLINES INC
    Louisville, KY
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA25LA2392025-06-22no fatalitiesmatch 98
    AIRBUS A320 · Spirit Airlines
    Nashville, TN
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA20CA0402019-12-15no fatalitiesmatch 98
    Embraer EMB145 · Piedmont Airlines
    Philadelphia, PA
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA21LA1092021-03-28no fatalitiesmatch 98
    EMBRAER EMB-145LR · Piedmont Airlines
    Charlotte, NC
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA20CA0382019-12-16no fatalitiesmatch 98
    Embraer EMB 135KL · Envoy Air Inc
    Alexandria, LA
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA18CA2512018-07-23no fatalitiesmatch 97
    Mcdonnell Douglas MD88 · Delta Air Lines
    Charlotte, NC
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA11CA0702011-05-16no fatalitiesmatch 96
    DE HAVILLAND DHC8 · Colgan Air Inc
    Baltimore, MD
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA12CA0862012-06-07no fatalitiesmatch 96
    BOEING 757 2B7 · American Airlines
    Philadelphia, PA
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter

What the record says

a pattern, not a findingacross the 8 closest cases · 8 carry coded findings · 8 have a probable cause
Findings the Board cited in those cases
Occurrences it coded
  • 8 of 8Turbulence encounter
Set against the Board’s own findings for this case
Cited here, and common in the precedents
  • Conditions/weather/phenomena › Turbulence
Cited here, not seen in the precedents
  • —
Common in the precedents, not cited here
  • —

A teaching device, not a verdict: what the record would have looked at, next to what the Board found.

In the Board’s words — the closest cases
  • DCA09CA0692009-08-04 · BOMBARDIER INC CL-600-2B19 · PINNACLE AIRLINES INC
    an inadvertent encounter with convective turbulence.
  • DCA25LA2392025-06-22 · AIRBUS A320 · Spirit Airlines
    The airplane’s encounter with moderate convective turbulence during descent.
  • DCA20CA0402019-12-15 · Embraer EMB145 · Piedmont Airlines
    An inadvertent encounter with convective turbulence.
  • DCA21LA1092021-03-28 · EMBRAER EMB-145LR · Piedmont Airlines
    an encounter with convective turbulence during descent.
  • DCA20CA0382019-12-16 · Embraer EMB 135KL · Envoy Air Inc
    an encounter with convectively induced turbulence while overflying an area of known convective activity.

This is the pattern in the NTSB’s own record across similar accidents — which findings it cited, what it coded, what it recommended. It is drawn from the record, not written about this case, and it never assigns blame: investigations exist to prevent the next accident (ICAO Annex 13).