Cases › DCA24LA316 › The analyst
BOEING 757-224UNITED 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.
5
timed facts
8
precedents
10
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
5 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- prior to 12:47:04 PDTFDRdescentp.5Aircraft descending under 32,000 feet when TCAS alerts indicatedsee the traces at this moment ↗
- 12:47:04 PDTFDRdescent/TCAS eventp.5TCAS Up Advisory indicated Don't Descendsee the traces at this moment ↗
- 12:47:04 to 12:47:06 PDTFDRTCAS event maneuverp.5Autopilot warning and master warning discrete parameters transitioned to Warn, the autopilot warn-2 systems disconnected, and all three autopilot commands switched off; pitch angle increased from -1.76 degrees to 2.81 degreessee the traces at this moment ↗
- 12:47:06 PDTFDRdescent/TCAS eventp.5TCAS Combined Control indicated Up Advisory Correctivesee the traces at this moment ↗
- within 5 seconds following 12:47:06 PDTFDRrecoveryp.5The autothrottle disengaged and disconnected, and the autopilot and master warnings turned offsee the traces at this moment ↗
Recorder events without a clock time
- during eventVertical load factor reached a maximum factor of 2.3208 G's and a minimum of 0.6014 G's
- within following minuteAll discrete parameters, control surfaces, and flight parameters had returned close to their initial state
FLIGHT DATA RECORDER - SPECIALIST'S FACTUAL REPORT · 7 events extracted by claude-sonnet-5
How the Board coded the sequence
- Enroute-descent: Near midair/TCAS alert/loss of separation→
- Enroute-descent: Abrupt maneuver
Precedents
8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded- BOEING 737-924ER · UNITED AIR LINES INCDenver, CO
- ●Environmental issues › Physical environment › Object/animal/substance
- BOEING 737 · Southwest Airlines, Co.Baltimore, MD
- ●Environmental issues › Physical environment › Object/animal/substance
- BOEING 717-200 · Southwest Airlines, Inc.Milwaukee, WI
- ●Environmental issues › Physical environment › Object/animal/substance
- DE HAVILLAND DHC8 - 102 · Piedmont AirlinesPhiladelphia, PA
- ●Environmental issues › Physical environment › Object/animal/substance
- AIRBUS INDUSTRIE A320 211 · DELTA AIR LINES INCMinneapolis, MN
- ●Environmental issues › Physical environment › Object/animal/substance
- EMBRAER EMB 145LR · American Eagle AirlinesSpringfield, MO
- ●Environmental issues › Physical environment › Object/animal/substance
- BOMBARDIER INC CL-600-2B19 · Air WisconsinNew York, NY
- ●Environmental issues › Physical environment › Object/animal/substance
- BOMBARDIER INC CL 600 2C10 · PSA AirlinesCharlotte, NC
- ●Environmental issues › Physical environment › Object/animal/substance
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 › Physical environment › Object/animal/substancecited here too
Occurrences it coded
- 6 of 8Birdstrike
Set against the Board’s own findings for this case
Cited here, and common in the precedents
- Physical environment › Object/animal/substance
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
- CEN12IA5022012-07-31 · BOEING 737-924ER · UNITED AIR LINES INC
An in-flight collision with a bird during descent to land, which resulted in damage to the left pitot tube and loss of airspeed information to the left and right primary flight displays (PFD). The reason for the total loss of indications on the left PFD could not be determined based on available evidence.
- DCA15CA0372014-12-13 · BOEING 737 · Southwest Airlines, Co.
an inadvertent encounter with birds during approach to land that resulted in substantial damage.
- CEN13LA0042012-10-05 · BOEING 717-200 · Southwest Airlines, Inc.
An obstruction (a sleeve of cups) that lodged under the catering truck brake pedal, which prevented the driver from stopping the truck before it struck the parked airplane.
- DCA14CA0312013-11-25 · DE HAVILLAND DHC8 - 102 · Piedmont Airlines
an inadvertent encounter with several birds during approach that resulted in substantial damage to the airplane.
- DCA12CA0432011-11-10 · AIRBUS INDUSTRIE A320 211 · DELTA AIR LINES INC
In-flight collision with birds during initial climb, which resulted in substantial damage to the aircraft.
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).