Atlas / NTSB / CHI75AC039

NTSB CAROL · Event

Event CHI75AC039

1974-10-31 ROCKFORD, Illinois, United States None 1 aircraft Status: Completed

Aircraft involved

N396DB Cessna 421B 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

CESSNA 421B · N396DB

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

B1

Operator type

E

Airport

GREATER ROCKFORD

Kind of flying

CJ

Weather at impact

Sky

BROKEN

Wind

200° / 16 kt

Temp

73° F

Aircraft history

Serial number

000042180139

Total time

2,103 hrs

Pilot

Certificate

Flight instructor (CFI)

Total hours

1,425

Age

24

Probable cause (from PRE1982.MDB)

ARREL ASSY & LWR FWD CLEVIS,BELLCRANK ASSY FAILED.

Investigator remarks

GR DNLOCK NOT CKD FOR TENSION WHEN RIGGED.UPPR B

Cause factors

68/A/D0 A
PERSONNEL IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL) Cause — pilot/personnel action
68/A/D4 A
PERSONNEL INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL) Cause — pilot/personnel action
70/A/CB A
AIRFRAME NORMAL RETRACTION/EXTENSION ASSEMBLY 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 3865. Source file NTSB_1974_3_3865.txt. Modern CAROL record on data.ntsb.gov ↗.

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