# NTSB CHI74FEP20: Helio Acft H-391B, N8750R, Eau Claire, WI, October 17, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 17, 1973
- Place: Eau Claire, WI · EAU CLAIRE, WI
- Location: 44.8113° N, 91.4985° W: Placed by OpenAirDocs: center of Eau Claire, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.8113&lon=-91.4985&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 10, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188065
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74FEP20
- Page: https://openairdocs.org/ntsb/CHI74FEP20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3405  73/10/17   EAU CLAIRE,WIS      HELIO ACFT H-391B   CR-  0  0  1  NONCOMMERCIAL             NO CERTIFICATE, AGE 38,
        TIME - 1653                    N8750R              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  550 TOTAL HOURS, 10 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - EAU CLAIRE
        DEPARTURE POINT             INTENDED DESTINATION
          REEDSVILLE,WIS              EAU CLAIRE,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           GEAR COLLAPSED                                           LANDING: GO-AROUND
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - PILOT FATIGUE
        REMARKS- PLT HAD FLOWN 8 HRS IN LAST 24 HR PERIOD VEERED L INITIATED GOARND HELD R RUDDER TOO LONG.
```

## Aircraft

- Registration: [N8750R](https://openairdocs.org/aircraft/N8750R), registered now, S/N 009 (OpenAirDocs)
- Reported make and model: HELIO ACFT H-391B
- Registry model: [Helio H-391B](https://openairdocs.org/model/helio-h-391b) (registry code 4300106) (OpenAirDocs)
- Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Eau Claire

## 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 19731017034519A](https://openairdocs.org/incident/19731017034519A), Oct 17, 1973: Helio H391B, Eau Claire, WI, Substantial damage. Plt had flown 8 hrs in last 24 hr period veered l initiated goarnd held r rudder too long.

## Other investigations on N8750R (1)

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.

- [NTSB CHI90LA031](https://openairdocs.org/ntsb/CHI90LA031), Nov 20, 1989: Helio H-391B (N8750R), Plainwell, MI, substantial damage. Probable cause: FAILURE OF THE CROSSWIND LANDING GEAR SYSTEM TO ENGAGE ON THE LEFT MAIN GEAR DUE TO IMPROPER RIGGING ADJUSTMENT BY MAINTENANCE PERSONNEL. FACTORS RELATED TO THE ACCIDENT WERE: UNFAVORABLE WIND…

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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