Atlas / NTSB / ANC75DAA16

NTSB CAROL · Event

Event ANC75DAA16

1974-09-09 BETTLES, Alaska, United States None 1 aircraft Status: Completed

Registry · N4336B

FAA Aircraft Registry record.

Make / Model

CESSNA 170B

Year of manufacture

1955 · 19 years old at event

Engine

CONT MOTOR 0-300 SER (145 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19570201

ADS-B equipped

Yes — Mode-S A5316F

Registrant of record

ALTHENS LEVI W

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N4336B 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 · N4336B

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Night

Weather

VMC

Phase of flight

Takeoff — initial climb (C1)

Operator type

D

Kind of flying

B0

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

000000026680

Total time

1,950 hrs

Pilot

Certificate

Commercial — instrument

Total hours

150

Probable cause (from PRE1982.MDB)

EAK IN INDUCTION SYSTEM.ANNUAL INSP OVERDUE.

Investigator remarks

COLLIDED WITH BOULDER.CARB LOOSE ON ENGINE.AIR L

Cause factors

68/C/D1 C
PERSONNEL IMPROPER MAINTENANCE (OWNER PERSONNEL) Cause
74/C/CG C
POWERPLANT CARBURETOR Cause
88/C/29 C
MISCELLANEOUS ACTS,CONDITIONS IMPROPERLY SECURED Cause
88/C/AJ C
MISCELLANEOUS ACTS,CONDITIONS LEAK/LEAKAGE Cause
83/B/F B
TERRAIN ROUGH/UNEVEN

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 3356. Source file NTSB_1974_3_3356.txt. Modern CAROL record on data.ntsb.gov ↗.

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