Atlas / NTSB / CHI79DEE41

NTSB CAROL · Event

Event CHI79DEE41

1979-02-10 PLAINFIELD, Illinois, United States None 1 aircraft Status: Completed

Aircraft involved

N9520U Grumman AA1C None

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

GRUMMAN AA1C · N9520U

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

C0

Operator type

Part 121 (air carrier)

Airport

CLOW

Kind of flying

A1

Weather at impact

Sky

UNKNOWN/NOT REPORTED

Wind

150° / 10 kt

Aircraft history

Serial number

000AA1C-0014

Total time

1,212 hrs

Pilot

Certificate

Airline transport

Total hours

39

Age

34

Cause factors

64/C/79 C
PILOT IN COMMAND FAILED TO MAINTAIN DIRECTIONAL CONTROL Cause
80/C/BC C
AIRPORTS/AIRWAYS/FACILITIES SNOW ON RUNWAY 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 3 0523. Source file NTSB_1979_3_0523.txt. Modern CAROL record on data.ntsb.gov ↗.

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