# NTSB ANC78DAH04: Helio Acft 391B, N6023, Iliamna, AK, July 26, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 26, 1978
- Place: Iliamna, AK · ILIAMNA, AK
- Location: 59.7568° N, 154.9111° W: Placed by OpenAirDocs: center of Iliamna, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=59.7568&lon=-154.9111&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report February 16, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 140444
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC78DAH04
- Page: https://openairdocs.org/ntsb/ANC78DAH04

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3969  78/7/26  NR.ILIAMNA,AK         HELIO ACFT 391B     CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 58, 10000
        TIME - 1800                    N6023               PX-  0  0  4  CORP/EXEC                 TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         ILIAMNA,AK                  UNKNOWN/NOT REPORTED
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - SELECTED UNSUITABLE TERRAIN
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
```

## Aircraft

- Registration: [N6023](https://openairdocs.org/deregistered/N6023-1981-05-08), registration cancelled 1981-05-08, S/N 071 (OpenAirDocs)
- Reported make and model: HELIO ACFT 391B
- Registry model: [Helio H-391B](https://openairdocs.org/model/helio-h-391b) (registry code 4300106) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## 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 19780726026709A](https://openairdocs.org/incident/19780726026709A), Jul 26, 1978: Helio H391, Iliamna, AK, Substantial damage

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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