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Cases › DCA24LA097 › The analyst

BOEING 777-222ERUNITED 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.

11
timed facts
8
precedents
15
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

11 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. 15:35:00 ESTFDRcruisep.5
    The flight was uneventful until the accident sequence occurred. The aircraft was at 26,993 feet (ft) at 314 knots (kts) computed airspeed and a magnetic heading of 117 degrees (deg). The autopilot (AP) and autothrottle (AT) were engaged.
    see the traces at this moment ↗
  2. 15:36:12 ESTFDRdescentp.5
    The aircraft began to descend from 27,006 ft. Vertical speed began to reduce from 0 feet per minute (fpm).
    see the traces at this moment ↗
  3. 15:36:13 EST - 15:40:54 ESTFDRdescentp.5
    The aircraft vertical speed varied between -500 fpm and -900 fpm.
    see the traces at this moment ↗
  4. 15:41:00 ESTFDRdescentp.5
    Vertical speed was -864 fpm. Vertical acceleration was approximately 1.01 g.
    see the traces at this moment ↗
  5. 15:41:17 ESTFDRdescentp.5
    Vertical speed was 144 fpm. Vertical acceleration had fluctuated between 0.98 g and 1.00 g.
    see the traces at this moment ↗
  6. 15:41:29 ESTFDRdescentp.5
    The aircraft passed through 24,000 ft at 307 kts computed airspeed.
    see the traces at this moment ↗
  7. 15:41:34 ESTFDRdescentp.5
    Vertical speed was -1704 fpm. Vertical acceleration was approximately 0.83 g.
    see the traces at this moment ↗
  8. 15:42:35 EST - 15:47:52 ESTFDRturbulence encounterp.5
    Vertical acceleration fluctuated rapidly between -0.55 g and 1.82 g. Vertical acceleration reached a maximum of 1.82 g at 15:42:52 EST. Vertical acceleration reached a minimum of -0.55 g at 15:42:53 EST. Vertical speed fluctuated between -2568 fpm and 568 fpm. The AP and AT did not disengage.
    see the traces at this moment ↗
  9. 15:47:53 ESTFDRrecoveryp.5
    Vertical acceleration began to stabilize around 1.00 g. The remainder of the flight was uneventful.
    see the traces at this moment ↗
  10. 16:04:28 ESTFDRapproachp.5
    The autopilot was disengaged.
    see the traces at this moment ↗
  11. 16:06:08 ESTFDRlandingp.5
    The aircraft landed on runway 22L at Newark International Airport (KEWR).
    see the traces at this moment ↗
QUICK ACCESS RECORDER - SPECIALIST'S FACTUAL REPORT · 11 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
  • WPR12LA0532011-12-02no fatalitiesmatch 77
    BOEING 737-7H4 · SOUTHWEST AIRLINES CO
    Oakland, CA
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    • ●Personnel issues › Action/decision › Action
    Turbulence encounter
  • DCA18CA2012018-06-10no fatalitiesmatch 76
    BOEING 777 223 · AMERICAN AIRLINES INC
    Decatur, TX
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    • ●Personnel issues › Action/decision › Action
    Turbulence encounter
  • DCA22LA1882022-08-19no fatalitiesmatch 76
    BOEING 737-824 · United Airlines
    Pharisburg, OH
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA11CA0602011-05-23no fatalitiesmatch 76
    BOEING 757 · Delta Airlines
    Boone, NC
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    • ●Personnel issues › Action/decision › Action
    Turbulence encounter
  • DCA23LA0932022-12-08no fatalitiesmatch 76
    BOEING 767-322 · UNITED AIRLINES INC
    Newark, NJ
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA16CA2202016-08-31no fatalitiesmatch 76
    BOEING 767 322 · United Airlines
    International Waters, A1
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA15LA0672015-02-15no fatalitiesmatch 76
    BOEING 767 · UNITED AIR LINES INC
    HONOLULU, PO
    • ●Environmental issues › Conditions/weather/phenomena › Turbulence
    Turbulence encounter
  • DCA25LA2382025-06-16no fatalitiesmatch 76
    BOEING 737-924ER · UNITED AIRLINES INC
    Fort Myers, FL
    • ●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
  • Action/decision › Action
Cited here, not seen in the precedents
  • Support/oversight/monitoring › (general)
  • Experience/knowledge › Knowledge
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
  • WPR12LA0532011-12-02 · BOEING 737-7H4 · SOUTHWEST AIRLINES CO
    The flight crew’s flight into known severe turbulence associated with mountain wave activity.
  • DCA18CA2012018-06-10 · BOEING 777 223 · AMERICAN AIRLINES INC
    the passengers failure to comply with the fasten seatbelt sign when the airplane encountered convective turbulence.
  • DCA22LA1882022-08-19 · BOEING 737-824 · United Airlines
    The airplane’s inadvertent encounter with convective turbulence.
  • DCA11CA0602011-05-23 · BOEING 757 · Delta Airlines
    Inadvertant encounter with convective turbulence while in cruise. Contributing to the severity of the accident was the unrestrained status of the passenger, contrary to the lighted seat belt sign.
  • DCA23LA0932022-12-08 · BOEING 767-322 · UNITED AIRLINES INC
    An inadvertent encounter with clear air turbulence during descent.

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).