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Atlas / NTSB / MKC76IK006

NTSB CAROL · Event

Event MKC76IK006

1975-07-09 SIOUX CITY, Iowa, United States None 1 aircraft Status: Completed

Aircraft involved

Historical record (pre-1982)

NTSB recorded this accident in the pre-1982 coded-field schema — structured fields rather than free-text narrative. Decoded codes use established NTSB single-letter taxonomies; cause factors remain verbatim pending the Form 6120.4 codebook lookup.

Aircraft

CONVAIR 580 · N4801C

Damage

Minor

Craft type

Airplane

Classification

C

Light condition

Dawn

Weather

VMC

Phase of flight

D0

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

Z

Pilot

Certificate

DA (DA)

Total hours

13,000

Age

42

Probable cause (from PRE1982.MDB)

RESULTING IN UNCONTAINED TURBINE FAILURE.

Investigator remarks

2ND STAGE TURBINE WHEEL (S/N KK15491) FRACTURED

Cause factors

  • 74/A/PG A
    POWERPLANT WHEEL TURBINE Cause — pilot/personnel action
  • 88/A/36 A
    MISCELLANEOUS ACTS,CONDITIONS FATIGUE FRACTURE Cause — pilot/personnel action

Decoded against the NTSB Form 6120.4 cause-factor codebook (ct_Pre1982 table). Each row shows the raw triplet, modifier (Cause / Factor / etc.), category, and specific code.

Source: NTSB pre-1982 historical archive. Docket 4 0027. Source file NTSB_1975_4_0027.txt. Modern CAROL record on data.ntsb.gov ↗.