Atlas / NTSB / OAK76FVM01

NTSB CAROL · Event

Event OAK76FVM01

1975-07-05 SAN FRANCISCO, California, United States None 1 aircraft Status: Completed

Aircraft involved

N4893 Enstrom F28A 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

ENSTROM F28A · N4893

Damage

Substantial

Craft type

Balloon

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

D0

Operator type

Personal/private

Airport

PIER 43 HELIPAD.

Kind of flying

CT

Weather at impact

Sky

CLEAR

Wind

300° / 20 kt

Aircraft history

Serial number

000000000045

Total time

1,708 hrs

Pilot

Certificate

Commercial

Total hours

2,052

Age

25

Probable cause (from PRE1982.MDB)

LED.

Investigator remarks

LOCAL SIGHTSEEING FLT. TAIL BOOM ATTACH BOLT FAI

Cause factors

78/C/D9 C
ROTORCRAFT OTHER Cause
88/C/36 C
MISCELLANEOUS ACTS,CONDITIONS FATIGUE FRACTURE Cause
88/K/88 K
MISCELLANEOUS ACTS,CONDITIONS AIRCRAFT CAME TO REST IN WATER 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 4031. Source file NTSB_1975_3_4031.txt. Modern CAROL record on data.ntsb.gov ↗.

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