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Atlas / NTSB / OAK71IP012

NTSB CAROL · Event

Event OAK71IP012

1970-08-26 SAN FRANCISCO, California, 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

BOEING 747 · N93108

Damage

Minor

Craft type

Airplane

Classification

C

Light condition

Dawn

Weather

IMC

Phase of flight

D0

Weather at impact

Sky

OVERCAST

Aircraft history

Serial number

000000019674

Total time

1,154 hrs

Pilot

Certificate

DA (DA)

Total hours

21,000

Age

50

Probable cause (from PRE1982.MDB)

ED,OIL SPRAYED ACCESS SECTION.LOOSE COVER PLATE.

Investigator remarks

NR 2 ENG QUIT,MACHINE BOLT FAILED.NR 4 ENG IGNIT

Cause factors

  • 74/A/KD A
    POWERPLANT COMPRESSOR STALLS Cause — pilot/personnel action
  • 88/A/36 A
    MISCELLANEOUS ACTS,CONDITIONS FATIGUE FRACTURE Cause — pilot/personnel action
  • 74/B/KY B
    POWERPLANT OTHER
  • 88/B/29 B
    MISCELLANEOUS ACTS,CONDITIONS IMPROPERLY SECURED
  • 88/B/51 B
    MISCELLANEOUS ACTS,CONDITIONS FIRE IN ENGINE
  • 68/C/D0 C
    PERSONNEL IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL) Cause

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 0051. Source file NTSB_1970_4_0051.txt. Modern CAROL record on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type. Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗