# NTSB LAX74FUG22: Johannsen Bensen, N4386, Adelanto, CA, November 4, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 4, 1973
- Place: Adelanto, CA · ADELANTO, CA
- Location: 34.5828° N, 117.4092° W: Placed by OpenAirDocs: center of Adelanto, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.5828&lon=-117.4092&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 28, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187974
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74FUG22
- Page: https://openairdocs.org/ntsb/LAX74FUG22

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3675   73/11/4 NR.ADELANTO,CALIF     JOHANNSEN BENSEN    CR-  0  0  1  NONCOMMERCIAL             STUDENT, AGE 37, 1 TOTAL
        TIME - 1005                    N4386               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, ALL IN TYPE, NOT
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          EL MIRAGE DRY LAKE          LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: LOW PASS
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - ATTEMPTED OPERATION BEYOND EXPERIENCE/ABILITY LEVEL
        FACTOR(S)
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           MISCELLANEOUS - UNQUALIFIED PERSON OPERATED AIRCRAFT
        REMARKS- ROTOR BLADES DEFLECTED INTO VERT TAIL & PUSHER PROP DURING SEVERE PORPOISE MANEUVER OF GYROCOPTER
```

## Aircraft

- Registration: [N4386](https://openairdocs.org/deregistered/N4386-1974-01-08), registration cancelled 1974-01-08, S/N 1001 (OpenAirDocs)
- Reported make and model: JOHANNSEN BENSEN
- Registry model: [Johannsen GYRO COPTER](https://openairdocs.org/model/johannsen-gyro-copter) (registry code 0570101) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed

## 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 19731104036549A](https://openairdocs.org/incident/19731104036549A), Nov 4, 1973: Amtr 0570101, Adelanto, CA, Destroyed. Rotor blades deflected into vert tail & pusher prop during severe porpoise maneuver of gyrocopter

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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