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Atlas / NTSB / CHI69D0157

NTSB CAROL · Event

Event CHI69D0157

1968-08-04 LAPEER, Michigan, United States None 1 aircraft Status: Completed

Registry · N92904

FAA Aircraft Registry record.

Make / Model

COMMONWEALTH 185

Year of manufacture

1946 · 22 years old at event

Engine

CONT MOTOR C85 SERIES (85 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19560629

ADS-B equipped

Yes — Mode-S ACE20E

Registrant of record

LEDBETTER TIM A

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

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

COMMONWLTH 185 · N92904

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dusk

Weather

VMC

Phase of flight

D1

Operator type

D

Airport

DUPONT-LAPEER

Kind of flying

B0

Weather at impact

Sky

CLEAR

Aircraft history

Total time

956 hrs

Pilot

Certificate

Commercial — instrument

Total hours

650

Age

38

Probable cause (from PRE1982.MDB)

FAILED.

Investigator remarks

OUTBOARD SECTION OF THE METAL LEADING EDGE STRIP

Cause factors

  • 74/C/FA C
    POWERPLANT BLADES Cause
  • 88/C/95 C
    MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE Cause
  • 88/L/49 L
    MISCELLANEOUS ACTS,CONDITIONS SEPARATION IN FLIGHT
  • 88/K/94 K
    MISCELLANEOUS ACTS,CONDITIONS OVERLOAD FAILURE 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 2691. Source file NTSB_1968_3_2691.txt. Modern CAROL record on data.ntsb.gov ↗.