Atlas / NTSB / SEA70DWA14

NTSB CAROL · Event

Event SEA70DWA14

1970-05-03 COVE, Oregon, United States None 1 aircraft Status: Completed

Aircraft involved

N73940 Bell 47G3B1 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 47G3B1 · N73940

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

DK

Operator type

Part 135 (air taxi/commuter)

Kind of flying

CA

Weather at impact

Sky

CLEAR

Temp

70° F

Aircraft history

Serial number

000000002818

Total time

2,723 hrs

Pilot

Certificate

Commercial

Total hours

3,840

Age

35

Probable cause (from PRE1982.MDB)

RED TO HAVE BEEN PROPERLY INSTALLED DURG OVERHAUL.

Investigator remarks

LOCKPLATE P/N402932-6 FOUND UNSCREWED.ASSY APPEA

Cause factors

74/C/AG C
POWERPLANT BLOWER,IMPELLER ASSEMBLY Cause
88/C/AV C
MISCELLANEOUS ACTS,CONDITIONS LOOSE,PART/FITTING Cause
88/C/BA C
MISCELLANEOUS ACTS,CONDITIONS BINDING Cause
88/L/24 L
MISCELLANEOUS ACTS,CONDITIONS JETTISONED LOAD

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 1710. Source file NTSB_1970_3_1710.txt. Modern CAROL record on data.ntsb.gov ↗.

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