Atlas / NTSB / ANC71DAA25

NTSB CAROL · Event

Event ANC71DAA25

1971-03-10 BETTLES, Alaska, United States None 1 aircraft Status: Completed

Registry · N3458C

FAA Aircraft Registry record.

Make / Model

CESSNA 170B

Engine

CONT MOTOR C145 SERIES (145 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19570417

ADS-B equipped

Yes — Mode-S A3D354

Registrant of record

THURMOND ROGER D

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N3458C Cessna 170B 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

CESSNA 170B · N3458C

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

C0

Operator type

D

Airport

CHANDALAR LAKE

Kind of flying

B2

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

Z

Total time

2,600 hrs

Pilot

Certificate

Commercial

Total hours

2,450

Age

39

Probable cause (from PRE1982.MDB)

DURG TKOF FROM ROUGH FROZEN LAKE.

Investigator remarks

LDG GR DMG NOT DISCOVERED DURG PREFLT.AXLE BROKE

Cause factors

64/A/29 A
PILOT IN COMMAND INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING Cause — pilot/personnel action
70/A/CF A
AIRFRAME WHEELS,TIRES,AXLES Cause — pilot/personnel action
88/A/AH A
MISCELLANEOUS ACTS,CONDITIONS PREVIOUS DAMAGE Cause — pilot/personnel action
80/A/BY A
AIRPORTS/AIRWAYS/FACILITIES OTHER Cause — pilot/personnel action

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 1020. Source file NTSB_1971_3_1020.txt. Modern CAROL record on data.ntsb.gov ↗.

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