# NTSB LAX70FUQ20: Hughes 369HS, N9035F, Piru, CA, April 9, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 9, 1970
- Place: Piru, CA · PIRU, CA
- Location: 34.4057° N, 118.8051° W: Placed by OpenAirDocs: center of Piru, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.4057&lon=-118.8051&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 7, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 135086
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX70FUQ20
- Page: https://openairdocs.org/ntsb/LAX70FUQ20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0653   70/4/9    PIRU,CALIF          HUGHES 369HS        CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 47, 8088
        TIME - 1535                    N9035F              PX-  0  0  0  EXPERIMENTATION           TOTAL HOURS, 1531 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          PIRU,CALIF                  PIRU,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           NOSE OVER/DOWN                                           LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        REMARKS- EXPERIMENTAL HYDROFOILS FAILED TO KEEP BOW OF FLOATS FROM SUBMERGING.
```

## Aircraft

- Registration: N9035F (not matched to a registry record)
- Reported make and model: HUGHES 369HS
- Category: Helicopter
- Engines: turbo shaft
- Damage: 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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