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Atlas / NTSB / ANC76DAH71

NTSB CAROL · Event

Event ANC76DAH71

1976-09-04 KING SALMON, Alaska, United States None 1 aircraft Status: Completed

Registry · N4702B

FAA Aircraft Registry record.

Make / Model

BELL HELICOPTER TEXTRON CANADA 407

Year of manufacture

2012

TCDS

H2SW · BELL HELICOPTER TEXTRON CANADA LTD

Engine

ROLLS-ROYC 250-C47B (650 hp)

Seats / Engines

8 seats · 1 engine

Last airworthiness date

20240702

ADS-B equipped

Yes — Mode-S A5C3BA

Registrant of record

NORTHROP GRUMMAN SYSTEMS CORP

Source: FAA Aircraft Registry (releasable master file).

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

CESSNA 180 · N4702B

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

Z

Phase of flight

Cruise — descent (EF)

Operator type

D

Kind of flying

B0

Weather at impact

Sky

UNKNOWN/NOT REPORTED

Aircraft history

Serial number

000000031600

Total time

2,000 hrs

Pilot

Certificate

Commercial

Total hours

780

Age

34

Investigator remarks

LND ON RIVER SAND BAR. RAN INTO WATER.

Cause factors

  • 64/C/79 C
    PILOT IN COMMAND FAILED TO MAINTAIN DIRECTIONAL CONTROL Cause
  • 64/L/35 L
    PILOT IN COMMAND SELECTED UNSUITABLE TERRAIN
  • 64/L/50 L
    PILOT IN COMMAND MISJUDGED SPEED
  • 88/K/88 K
    MISCELLANEOUS ACTS,CONDITIONS AIRCRAFT CAME TO REST IN WATER Joint factor
  • 83/L/Y L
    TERRAIN OTHER

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 3151. Source file NTSB_1976_3_3151.txt. Modern CAROL record on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type. Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗