Atlas / NTSB / ANC76AA017

NTSB CAROL · Event

Event ANC76AA017

1975-07-30 BARTER ISLAND, Alaska, United States None 1 aircraft Status: Completed

Aircraft involved

N1491W Bell 206A 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 206A · N1491W

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Night

Weather

VMC

Phase of flight

D1

Operator type

E

Kind of flying

CI

Weather at impact

Sky

OVERCAST

Wind

180° / 25 kt

Temp

38° F

Aircraft history

Serial number

000000000411

Total time

2,649 hrs

Pilot

Certificate

Commercial

Total hours

2,700

Age

27

Probable cause (from PRE1982.MDB)

WHEEL BLADES FAILED.

Investigator remarks

FLT UNDER 50FT CLG,LOW VIS. 5TH STAGE COMPRESSOR

Cause factors

74/C/MF C
POWERPLANT BLADE,COMPRESSOR ROTOR Cause
88/C/36 C
MISCELLANEOUS ACTS,CONDITIONS FATIGUE FRACTURE Cause
64/B/49 B
PILOT IN COMMAND MISJUDGED SPEED AND ALTITUDE
64/B/27 B
PILOT IN COMMAND IMPROPER IN-FLIGHT DECISIONS OR PLANNING
82/K/A K
WEATHER LOW CEILING Joint factor
82/K/C K
WEATHER FOG Joint factor
88/K/AQ K
MISCELLANEOUS ACTS,CONDITIONS DOWNWIND Joint factor
83/K/F K
TERRAIN ROUGH/UNEVEN 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 4016. Source file NTSB_1975_3_4016.txt. Modern CAROL record on data.ntsb.gov ↗.

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