Atlas / NTSB / SEA70DWD16

NTSB CAROL · Event

Event SEA70DWD16

1970-05-23 SKYKOMISH, Washington, United States None 1 aircraft Status: Completed

Registry · N56909

FAA Aircraft Registry record.

Make / Model

BOEING A75N1

Engine

CONT MOTOR W670 SERIES (250 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19970804

ADS-B equipped

Yes — Mode-S A74AD3

Registrant of record

GREENE HARRY L III

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N56909 Stearman PT-17 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

STEARMAN PT-17 · N56909

Damage

Destroyed

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

SCATTERED-ABOVE 1000 FEET

Wind

270° / 10 kt

Temp

40° F

Aircraft history

Serial number

00000075-342

Total time

1,917 hrs

Pilot

Certificate

Commercial — instrument

Total hours

199

Age

43

Cause factors

64/C/21 C
PILOT IN COMMAND IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS Cause
82/C/G C
WEATHER CONDITIONS CONDUCIVE TO CARB./INDUCTION SYSTEM ICING Cause
88/C/02 C
MISCELLANEOUS ACTS,CONDITIONS ANTI-ICING/DEICING EQUIPMENT-IMPROPER OPERATION OF/OR FAILED TO USE Cause
88/C/72 C
MISCELLANEOUS ACTS,CONDITIONS ICE-CARBURETOR 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 2334. Source file NTSB_1970_3_2334.txt. Modern CAROL record on data.ntsb.gov ↗.

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