Cases › WPR13LA131 › The analyst
BOEING 747-422United 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.
7
timed facts
8
precedents
8
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
7 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- 14:16:00 UTCFDRCruisep.3FDR data indicated vertical acceleration variations began, ranging between 1.3 g's and 0.65 g's; pressure altitude started at about 37,000 ftsee the traces at this moment ↗
- 14:24:00 UTCFDRCruisep.3Pressure altitude increased to about 39,000 ft (approximately 8 minutes after 14:16:00 UTC)see the traces at this moment ↗
- 16:41:40 UTCFDRCruisep.3Pressure altitude, having remained at about 39,000 ft for approximately 2 hours and 18 minutes, began to decreasesee the traces at this moment ↗
- 16:41:40 to 17:13:30 UTCFDRCruisep.3Over approximately 31 minutes and 50 seconds, pressure altitude decreased to a minimum of 37,575 ft, then increased to a maximum of approximately 41,000 ft before decreasing and settling at a pressure altitude of about 33,000 feetsee the traces at this moment ↗
- 17:13:30 UTCFDRCruisep.3Vertical acceleration variations endedsee the traces at this moment ↗
- 18:31:07 UTCFDRLandingp.3The aircraft landedsee the traces at this moment ↗
- 18:40:00 UTCFDRPost-landingp.2End of FDR recordingsee the traces at this moment ↗
Recorder events without a clock time
- 0540 UTCFlight departed Sydney (YSSY/SYD), Australia airport on an IFR flight plan
- 1500 UTCN174UA encountered turbulence during cruise flight over the Pacific Ocean while en route to SFO
Flight Data Recorder Factual Report · 9 events extracted by claude-sonnet-5
How the Board coded the sequence
- Enroute-cruise: Turbulence encounter
Precedents
8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded- BOEING 737-7H4 · SOUTHWEST AIRLINES COLaverne, OK
- ●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 737-7H4 · SOUTHWEST AIRLINES COPawnee, NE
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - BOEING 767-322 · UNITED AIRLINES INCKingston, CB
- ●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 767-322 · UNITED AIRLINES INCGulf of America , GM
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - AIRBUS A321 · U.S Airways Inc.,Millville, NJ
- ●Environmental issues › Conditions/weather/phenomena › Turbulence
Turbulence encounter - MCDONNELL DOUGLAS DC10 · Omni Air InternationalPacific Ocean, USA
- ●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
- Aircraft systems › Communications system
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
- WPR12LA1442012-03-20 · BOEING 737-7H4 · SOUTHWEST AIRLINES CO
The airplane’s encounter with severe turbulence during cruise flight, which resulted in a serious injury to a flight 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.
- WPR12LA1192012-02-23 · BOEING 737-7H4 · SOUTHWEST AIRLINES CO
The airplane's encounter with moderate turbulence during cruise flight, which resulted in a serious injury to a flight attendant.
- DCA25LA0232024-11-03 · BOEING 767-322 · UNITED AIRLINES INC
An inadvertent encounter with convective turbulence while in enroute cruise flight.
- 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).