Atlas / NTSB / OAK69D0172

NTSB CAROL · Event

Event OAK69D0172

1968-11-11 SAN BRUNO, California, United States None 1 aircraft Status: Completed

Registry · N133L

FAA Aircraft Registry record.

Make / Model

BEECH C35

Year of manufacture

1952 · 16 years old at event

Engine

CONT MOTOR TSIO-520-D (285 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

20160512

ADS-B equipped

Yes — Mode-S A08750

Registrant of record

BLAIR BYRON

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N133L Beech C35 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

BEECH C35 · N133L

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Night

Weather

VMC

Phase of flight

B1

Operator type

D

Airport

SAN FRANCISCO

Kind of flying

B2

Weather at impact

Sky

UNKNOWN/NOT REPORTED

Wind

315° / 8 kt

Temp

60° F

Aircraft history

Total time

3,350 hrs

Pilot

Certificate

Commercial — instrument

Total hours

350

Age

52

Probable cause (from PRE1982.MDB)

ON ACFT SINCE ANNUAL INSPECTION.

Investigator remarks

WORN PUCKS IN LT BRAKE ASSEMBLY.APPROX 5 FLT HRS

Cause factors

68/A/D0 A
PERSONNEL IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL) Cause — pilot/personnel action
70/A/CJ A
AIRFRAME BRAKING SYSTEM (NORMAL SYSTEM) Cause — pilot/personnel action

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 3842. Source file NTSB_1968_3_3842.txt. Modern CAROL record on data.ntsb.gov ↗.

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