Cases › WPR12LA057 › The analyst
BOEING 757-222United 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.
3
timed facts
8
precedents
9
passages to ask
Ask the docket
passages, not paraphrasesTry
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
3 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- 13:39:16 PST to 13:39:44 PSTFDRCruise/approach at FL300p.3Vertical acceleration fluctuated between approximately 0 g's and 2 g's, peaking at a maximum of 1.91 g's and a minimum of 0.25 g's; lateral acceleration fluctuated between about -0.2 g's and 0.2 g's, peaking at a maximum of 0.21 g's and a minimum of -0.17 g's. Autopilot was engaged, pressure altitude was at approximately 30,000 feet, and computed airspeed was about 309 knots.see the traces at this moment ↗
- After 13:39:44 PSTFDRDescentp.3Aircraft began its descent from 30,000 feet following the acceleration excursionssee the traces at this moment ↗
- 14:01:01 PSTFDRLandingp.3Aircraft landedsee the traces at this moment ↗
Recorder events without a clock time
- 1215 PSTFlight departed Denver International Airport (DEN)
Flight Data Recorder – Specialist’s Factual Report · 4 events extracted by claude-sonnet-5
How the Board coded the sequence
- Approach-IFR initial approach: Turbulence encounter
Precedents
8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded- BOEING 737 · Continental AirlinesKaycee, WY
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 737 824 · United AirlinesDenver, CO
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 757-2B7 · U.S. Airways, Inc.Cheltenham, MD
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 737-924ER · UNITED AIR LINES INCPlevna, KS
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 767 · International Lease Finance CorpPago Pago, AQ
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 787 · UNITED AIR LINES INCBeaumont, TX
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 737-7H4 · SOUTHWEST AIRLINES COOrlando, FL
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 717-200 · DELTA AIR LINES INCDetroit, MI
- ●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 causeFindings the Board cited in those cases
- 8 of 8Environmental issues › Conditions/weather/phenomena › Turbulencecited here too
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
- DCA14LA0602014-02-17 · BOEING 737 · Continental Airlines
an encounter with severe mountain wave turbulence during cruise flight.
- DCA17CA0422016-12-14 · BOEING 737 824 · United Airlines
An inadvertent encounter with mountain wave turbulence.
- ERA11CA2472011-04-17 · BOEING 757-2B7 · U.S. Airways, Inc.
The in-flight encounter with turbulence, resulting in an injury to a cabin attendant.
- DCA16CA0102015-10-24 · BOEING 737-924ER · UNITED AIR LINES INC
An inadvertent encounter with clear air turbulence resulting in a serious injury to a flight attendant.
- WPR11LA0712010-12-03 · BOEING 767 · International Lease Finance Corp
The airplane’s encounter with convectively-induced turbulence, which resulted in serious injury to one flight attendant.
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).