Atlas / NTSB / ANC73DAA21

NTSB CAROL · Event

Event ANC73DAA21

1973-05-12 BETTLES, Alaska, United States None 1 aircraft Status: Completed

Registry · N1868G

FAA Aircraft Registry record.

Make / Model

CHAMPION 7GCBC

Year of manufacture

1968 · 5 years old at event

Engine

LYCOMING 0-320 SERIES (180 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19680510

ADS-B equipped

Yes — Mode-S A15A6D

Registrant of record

BROWN KIRK W

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N1868G Champion 7GCBC 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

CHAMPION 7GCBC · N1868G

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

D1

Operator type

D

Kind of flying

B0

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

000000000109

Total time

1,758 hrs

Pilot

Certificate

Commercial — instrument

Total hours

8,000

Age

46

Probable cause (from PRE1982.MDB)

ON FROZEN LAKE,GR BROKE THRU.ANNUAL INSP OVER DUE.

Investigator remarks

EXHAUST STACK FAILED AT MUFFLER ATTACH. PLT LND

Cause factors

74/C/G5 C
POWERPLANT STACKS Cause
88/C/95 C
MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE Cause
68/C/D6 C
PERSONNEL INADEQUATE MAINTENANCE AND INSPECTION Cause
64/B/35 B
PILOT IN COMMAND SELECTED UNSUITABLE TERRAIN
64/L/29 L
PILOT IN COMMAND INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
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 1036. Source file NTSB_1973_3_1036.txt. Modern CAROL record on data.ntsb.gov ↗.

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