Atlas / NTSB / OAK74AP059

NTSB CAROL · Event

Event OAK74AP059

1974-05-09 LONE PINE, California, United States Serious 1 aircraft Status: Completed

Aircraft involved

N73212 Bell 47G3B1 Serious

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

BELL 47G3B1 · N73212

Damage

Destroyed

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

A7

Operator type

E

Kind of flying

CI

Weather at impact

Sky

CLEAR

Wind

045° / 5 kt

Temp

80° F

Aircraft history

Serial number

000000002748

Total time

4,994 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

5,473

Age

41

Probable cause (from PRE1982.MDB)

VE ASSY YOKE BROKE.P/N47-640-006-5.REASON UNDET.

Investigator remarks

PARKED ON MT RIDGE-ENGINE RUNNING.TAIL ROTOR DRI

Cause factors

78/C/AY C
ROTORCRAFT OTHER Cause
88/C/95 C
MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE 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 3046. Source file NTSB_1974_3_3046.txt. Modern CAROL record on data.ntsb.gov ↗.

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