Atlas / NTSB / OAK66A0058

NTSB CAROL · Event

Event OAK66A0058

1966-06-20 LONE PINE, California, United States None 1 aircraft Status: Completed

Aircraft involved

N73987 Bell 47G3B1 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

BELL 47G3B1 · N73987

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Takeoff — initial climb (C1)

Operator type

Public use

Kind of flying

CT

Weather at impact

Sky

CLEAR

Temp

50° F

Aircraft history

Total time

1,975 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

7,327

Age

40

Probable cause (from PRE1982.MDB)

ARING.STRUCK TREE WHILE LANDING AT TAKEOFF POINT.

Investigator remarks

TURBOCHARGER MALFUNCTION.UNABLE CLIMB OUT OF CLE

Cause factors

74/A/AG A
POWERPLANT BLOWER,IMPELLER ASSEMBLY Cause — pilot/personnel action
64/B/47 B
PILOT IN COMMAND MISJUDGED DISTANCE
82/J/W J
WEATHER HIGH DENSITY ALTITUDE Joint 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 2 0580. Source file NTSB_1966_2_0580.txt. Modern CAROL record on data.ntsb.gov ↗.

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