Atlas / NTSB / CHI79FEX25

NTSB CAROL · Event

Event CHI79FEX25

1979-05-17 WESTFIELD, Indiana, United States None 1 aircraft Status: Completed

Aircraft involved

N51711 Bell 47J2 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

BELL 47J2 · N51711

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

D1

Operator type

Business

Airport

WESTFIELD

Kind of flying

B2

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

000000000262

Total time

2,979 hrs

Pilot

Certificate

Commercial

Total hours

14,150

Age

57

Probable cause (from PRE1982.MDB)

TION AFT OF MAIN TRANSMISSION.

Investigator remarks

MISSING SNAP RING IN DRIVE COUPLING AT FIRST STA

Cause factors

78/C/BG C
ROTORCRAFT TAIL ROTOR DRIVE SHAFT ASSEMBLY Cause
88/C/90 C
MISCELLANEOUS ACTS,CONDITIONS MISSING 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 1127. Source file NTSB_1979_3_1127.txt. Modern CAROL record on data.ntsb.gov ↗.

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