Atlas / NTSB / CHI74IC091

NTSB CAROL · Event

Event CHI74IC091

1974-05-16 CHICAGO, Illinois, United States None 1 aircraft Status: Completed

Registry · N423S

FAA Aircraft Registry record.

Make / Model

PIPER PA-34-220T

Year of manufacture

1981

Engine

CONT MOTOR TSIO-360 SER (225 hp)

Seats / Engines

7 seats · 2 engines

Last airworthiness date

19820201

ADS-B equipped

Yes — Mode-S A50854

Registrant of record

V & L ENTERPRISES LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N423S Swearingen SA226T 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

SWEARINGEN SA226T · N423S

Damage

Minor

Craft type

Airplane

Classification

C

Light condition

Dawn

Weather

VMC

Phase of flight

D1

Operator type

E

Kind of flying

CI

Weather at impact

Sky

UNKNOWN/NOT REPORTED

Aircraft history

Serial number

0000000TC209

Total time

144 hrs

Pilot

Certificate

DA (DA)

Total hours

11,500

Age

35

Probable cause (from PRE1982.MDB)

ACK.144HRS.BLADE HIT PARKED AUTO.

Investigator remarks

FATIGUE CRACK ORIGD AT SMALL STRESS CORROSION CR

Cause factors

68/A/J0 A
PERSONNEL SUBSTANDARD QUALITY CONTROL Cause — pilot/personnel action
74/A/ZD A
POWERPLANT BLADES Cause — pilot/personnel action
88/A/36 A
MISCELLANEOUS ACTS,CONDITIONS FATIGUE FRACTURE Cause — pilot/personnel action
88/J/49 J
MISCELLANEOUS ACTS,CONDITIONS SEPARATION IN FLIGHT 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 5 0030. Source file NTSB_1974_5_0030.txt. Modern CAROL record on data.ntsb.gov ↗.

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