# NTSB CHI80FCA01: Bell 206A, N7864S, Cahokia, IL, August 3, 1980

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: August 3, 1980
- Place: Cahokia, IL · CAHOKIA, IL
- Location: 38.5709° N, 90.1901° W: Placed by OpenAirDocs: center of Cahokia, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.5709&lon=-90.1901&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report October 3, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 129674
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI80FCA01
- Page: https://openairdocs.org/ntsb/CHI80FCA01

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2093   80/8/3    CAHOKIA,IL          BELL 206A           CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 31, 1600
        TIME - 1630                    N7864S              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 150 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - PARKS BI-STATE
        DEPARTURE POINT             INTENDED DESTINATION
          DUQUOIN,IL                  CAHOKIA,IL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- DRG RECENT OVRHAUL OF FREE WHLG CLUTCH,PARTS INSTALLED BCKWRDS.ROTOR MAST,PN 206-010-332-17,SEPD.
```

## Aircraft

- Registration: N7864S (not matched to a registry record)
- Reported make and model: BELL 206A
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Parks Bi-State

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19800803036119A](https://openairdocs.org/incident/19800803036119A), Aug 3, 1980: Bell 206A, Cahokia, IL, Substantial damage. Main motor mast failed after helicopter had been positioned on parking ramp after flight.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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