Atlas / NTSB / SEA72FYE03

NTSB CAROL · Event

Event SEA72FYE03

1971-07-16 SKYKOMISH, Washington, United States Fatal 1 aircraft Status: Completed

Registry · N9749C

FAA Aircraft Registry record.

Make / Model

HILLER UH-12E

TCDS

4H11 · SIAM HILLER HOLDINGS INC

Engine

LYCOMING VO-540 SERIES (310 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19660513

ADS-B equipped

Yes — Mode-S AD9617

Registrant of record

SUMMIT HELICOPTERS INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N9749C Hiller 12E Fatal

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

HILLER 12E · N9749C

Damage

Destroyed

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

DE

Operator type

Part 135 (air taxi/commuter)

Kind of flying

CB

Weather at impact

Sky

CLEAR

Aircraft history

Serial number

000000002146

Total time

3,320 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

2,800

Age

39

Probable cause (from PRE1982.MDB)

RAYING PWR LINE R OF WAY WITH DOW TORON 101.

Investigator remarks

ACFT HIT PWR LINE JUST AFT TURN INTO THE SUN. SP

Cause factors

64/C/15 C
PILOT IN COMMAND FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS Cause
83/C/I C
TERRAIN HIGH OBSTRUCTIONS Cause
88/L/79 L
MISCELLANEOUS ACTS,CONDITIONS SUNGLARE

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 1207. Source file NTSB_1971_3_1207.txt. Modern CAROL record on data.ntsb.gov ↗.

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