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Cases › DCA23LA468 › The analyst

BOEING 737-9UNITED AIRLINES INC

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.

4
timed facts
8
precedents
8
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

4 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. 14:28:33 MDTFDRPre-taxip.5
    FDR started recording
    see the traces at this moment ↗
  2. 14:33:09 MDTFDRTaxip.5
    Aircraft started moving
    see the traces at this moment ↗
  3. 14:53:12 MDTFDRTakeoff rollp.5
    Aircraft began its takeoff roll
    see the traces at this moment ↗
  4. 14:53:55 MDTFDRRejected takeoffp.5
    Aircraft came to a complete stop
    see the traces at this moment ↗
FLIGHT DATA RECORDER - SPECIALISTA��S FACTUAL REPORT · 4 events extracted by claude-sonnet-5
How the Board coded the sequence
  1. Takeoff-rejected takeoff: Fire/smoke (non-impact)

Precedents

8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded
  • DCA25LA0252024-10-24substantialmatch 74
    BOEING 737-9 · United Airlines
    Houston, TX
    • ●Aircraft › Aircraft systems › Landing gear system
    • ●Personnel issues › Action/decision › Action
  • DCA19LA0702019-01-29substantialmatch 67
    Boeing 727 200 · Kalitta Charters Ii Llc
    Tuscaloosa, AL
    • ●Aircraft › Aircraft systems › Landing gear system
    • ●Personnel issues › Action/decision › Action
  • CEN11IA2642011-03-30no fatalitiesmatch 65
    BOMBARDIER INC CL-600-2B19 · PINNACLE AIRLINES INC
    Detroit, MI
    • ●Aircraft › Aircraft systems › Landing gear system
    • ●Personnel issues › Action/decision › Action
  • DCA25LA2752025-07-26substantialmatch 61
    BOEING 737-8 · American Airlines, Inc.
    Denver, CO
    • ●Aircraft › Aircraft systems › Landing gear system
  • CEN09IA2942009-05-13no fatalitiesmatch 60
    BOEING 737 · SOUTHWEST AIRLINES CO
    Houston, TX
    • ●Personnel issues › Action/decision › Action
    Fire/smoke (non-impact)
  • DCA19CA1672019-06-15substantialmatch 58
    Boeing 757 · United Airlines
    Newark, NJ
    • ●Personnel issues › Action/decision › Action
  • DCA13CA0432013-01-25substantialmatch 54
    MCDONNELL DOUGLAS MD11 · FEDERAL EXPRESS CORP
    Denver, CO
    • ●Personnel issues › Action/decision › Action
  • DCA19IA0362018-12-06no fatalitiesmatch 51
    Boeing 737 · Southwest Airlines
    Burbank, CA
    • ●Personnel issues › Action/decision › Action

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
  • 2 of 8Part(s) separation from AC
Set against the Board’s own findings for this case
Cited here, and common in the precedents
  • Aircraft systems › Landing gear system
  • Action/decision › Action
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
  • DCA25LA0252024-10-24 · BOEING 737-9 · United Airlines
    Brake application before all three landing gears were on the ground, which caused the failure of the right main landing gear tires and resulted in tire fragments impacting the fuselage.
  • DCA19LA0702019-01-29 · Boeing 727 200 · Kalitta Charters Ii Llc
    the captain's decision to continue the landing with an unsafe gear indication.
  • CEN11IA2642011-03-30 · BOMBARDIER INC CL-600-2B19 · PINNACLE AIRLINES INC
    The mechanic's incomplete securing of all the wheel well bin's fasteners, which resulted in separation of the bin from the airplane.
  • DCA25LA2752025-07-26 · BOEING 737-8 · American Airlines, Inc.
    The failure of the airplane’s left main landing gear tires and wheels during the takeoff roll due to the thermal relief plugs melting and releasing tire pressure, which resulted in abnormal airplane handling characteristics and led the flight crew to reject the takeoff at high speed.
  • CEN09IA2942009-05-13 · BOEING 737 · SOUTHWEST AIRLINES CO
    The pilot's inadvertent application of excessive braking after touchdown, which caused the right wheels to lock and several tires to blow and resulted in a subsequent brake fire.

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).