Atlas / NTSB / OAK75DVA39

NTSB CAROL · Event

Event OAK75DVA39

1975-01-01 MADERA, California, United States None 1 aircraft Status: Completed

Aircraft involved

N8973 Bensen B8M 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

BENSEN B8M · N8973

Damage

Substantial

Craft type

I

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

EB

Operator type

D

Airport

MADERA

Kind of flying

B1

Weather at impact

Sky

CLEAR

Temp

40° F

Aircraft history

Serial number

00000000ATG1

Total time

5 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

1,601

Age

27

Investigator remarks

REASON FOR MAG FAILURE NOT DETERMINED.

Cause factors

74/C/BA C
POWERPLANT MAGNETOS Cause
88/C/95 C
MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE Cause
64/K/18 K
PILOT IN COMMAND FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M. Joint factor

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 0093. Source file NTSB_1975_3_0093.txt. Modern CAROL record on data.ntsb.gov ↗.

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