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Cases › ENG08IA038 › The analyst

BOEING 757DELTA AIR LINES 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.

1
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

1 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. 15:45 PDTFDRTakeoffp.1
    Delta Airlines 624, a Boeing 757-232 equipped with Pratt & Whitney PW2037 engines, experienced an uncontained failure in the turbine area of the No. 2 (right) engine
Recorder events without a clock time
  • N/AThe crew received a No. 2 engine fire warning light and rejected the takeoff
  • N/ASmoke was observed from the No. 2 engine at the time the takeoff was rejected
  • N/AMetal debris was found on the runway after the airplane had taxied clear
  • N/AExamination of the engine at the gate revealed a hole in the engine cowl that was in line with a hole in the high pressure turbine case
  • SRN 91454The Eng2 Vib parameter shows a rise in engine vibration
  • SRN 91462The Eng2 Fire indication is set
Flight Data Recorder 10 - Specialists Factual Report · 7 events extracted by claude-sonnet-5
How the Board coded the sequence
  1. Takeoff-rejected takeoff: Powerplant sys/comp malf/fail

Precedents

8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded
  • ENG14IA0012013-10-15no fatalitiesmatch 89
    AIRBUS A319 132 · Spirit Airlines
    Greenville, TX
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
    Powerplant sys/comp malf/fail
  • ENG17IA0282017-06-10no fatalitiesmatch 87
    BOMBARDIER INC CL 600 2C10 · SKYWEST AIRLINES INC
    Chicago, IL
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
    Powerplant sys/comp malf/fail
  • ENG13IA0052012-11-07no fatalitiesmatch 82
    BOEING MD-88 · DELTA AIR LINES INC
    Atlanta, GA
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
  • ENG12IA0032011-10-23no fatalitiesmatch 79
    BOEING 747-451 · DELTA AIR LINES INC
    Detroit, MI
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
  • ENG17IA0062016-11-29no fatalitiesmatch 79
    BOMBARDIER INC CL 600 2C10 · GoJet Airlines, LLC.
    Kansas, IL
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
    Powerplant sys/comp malf/fail
  • ENG17IA0262017-06-07no fatalitiesmatch 78
    BOEING 747 451 · Delta Air Lines
    Tokyo, JP
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
  • ANC08IA0922008-07-29no fatalitiesmatch 78
    Saab-Scania AB (Saab) SAAB 340B · PENINSULA AIRWAYS INC
    Anchorage, AK
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)
    Powerplant sys/comp malf/fail
  • ENG16IA0012015-10-02no fatalitiesmatch 76
    BOEING 747 · Delta Air Lines
    Russian airspace, JP
    • ●Aircraft › Aircraft power plant › Engine (turbine/turboprop)

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
  • 4 of 8Powerplant sys/comp malf/fail
  • 3 of 8Uncontained engine failure
  • 2 of 8Engine shutdown
  • 2 of 8Loss of engine power (total)
Set against the Board’s own findings for this case
Cited here, and common in the precedents
  • Aircraft power plant › Engine (turbine/turboprop)
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
  • ENG14IA0012013-10-15 · AIRBUS A319 132 · Spirit Airlines
    A high pressure turbine 2nd stage blade separation due to stress corrosion cracking in the J channel cooling cavity. The failed blade entered the gas path and caused substantial damage to the low pressure turbine. The engine was subsequently left at a high power setting for approximately four minutes, exposing the turbine hardware to temperatures that exceeded the material annealing temperature and resulted in in failure and separation of multiple engine components.
  • ENG17IA0282017-06-10 · BOMBARDIER INC CL 600 2C10 · SKYWEST AIRLINES INC
    A Bombardier CRJ700 No. 1 engine failure caused by buckling of the combustion outer liner due to fatigue cracks. The liner buckling resulted in airflow disruption and reduced engine performance. The engine fuel control unit attempted to compensate for the decrease in engine performance by increasing the fuel flow rate. The combustion liner damage and increased fuel flow led to incomplete combustion of the fuel injected into the combustion chamber. Unconsumed fuel then ignited downstream of the combustion chamber (d…
  • ENG13IA0052012-11-07 · BOEING MD-88 · DELTA AIR LINES INC
    The 4th stage turbine blade separation that resulted in an uncontained release of low pressure turbine blade material was Delta Air Lines' repair process for the turbine blades' tip shrouds. It was not possible to identify the part of the repair process that led to the premature wear of the blade's tip shoud and subsequent separation.
  • ENG12IA0032011-10-23 · BOEING 747-451 · DELTA AIR LINES INC
    The penetration of turbine blade fragments through the rear turbine case, which punctured the No. 4 bearing oil pressure supply tube, allowing misted oil to contact the hot engine case and ignite the undercowl fire. Contributing to the incident was the installation of approved (but not preferred) stage 3 low pressure turbine outer transition duct segments with the riveted rear seal configuration and the failure of the engine design to comply with the engine debris containment requirements of 14 Code of Federal R…
  • ENG17IA0062016-11-29 · BOMBARDIER INC CL 600 2C10 · GoJet Airlines, LLC.
    The probable cause of the uncontained No. 1 (left) engine failure was a separated high pressure turbine 2nd stage blade that failed due to a fatigue crack that originated below the blade platform from an area of corrosion.

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).