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Atlas / NTSB / SEA77DYA35

NTSB CAROL · Event

Event SEA77DYA35

1977-09-11 ETNA, Wyoming, 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

HUGHES 369D · N8396F

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

EJ

Operator type

E

Kind of flying

CI

Weather at impact

Sky

CLEAR

Wind

180° / 5 kt

Temp

55° F

Aircraft history

Serial number

00000370102D

Total time

47 hrs

Pilot

Certificate

Commercial

Total hours

3,079

Age

29

Investigator remarks

DENSITY ALT 8740FT.PLT FLT TIME 10HRS IN LAST 24

Cause factors

  • 64/A/35 A
    PILOT IN COMMAND SELECTED UNSUITABLE TERRAIN Cause — pilot/personnel action
  • 64/A/07 A
    PILOT IN COMMAND DELAYED IN INITIATING GO-AROUND Cause — pilot/personnel action
  • 64/A/18 A
    PILOT IN COMMAND FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M. Cause — pilot/personnel action
  • 82/J/W J
    WEATHER HIGH DENSITY ALTITUDE Joint cause
  • 88/J/62 J
    MISCELLANEOUS ACTS,CONDITIONS PILOT FATIGUE Joint 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 2797. Source file NTSB_1977_3_2797.txt. Modern CAROL record on data.ntsb.gov ↗.