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Atlas / NTSB / UNK64X3889

NTSB CAROL · Event

Event UNK64X3889

1964-09-09 NEBESNA, Alaska, 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

PIPER PA11 · N4801M

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Cruise — descent (EF)

Operator type

D

Kind of flying

B2

Weather at impact

Sky

CLEAR

Aircraft history

Total time

2,673 hrs

Pilot

Certificate

Commercial — instrument

Age

38

Cause factors

  • 64/C/22 C
    PILOT IN COMMAND IMPROPER OPERATION OF BRAKES AND/OR FLIGHT CONTROLS Cause
  • 88/K/94 K
    MISCELLANEOUS ACTS,CONDITIONS OVERLOAD FAILURE Joint factor

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 3 2838. Source file NTSB_1964_3_2838.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 ↗