# NTSB FTW81DQD34: Bensen B8M, N4218Z, Carlsbad, NM, September 11, 1981

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 11, 1981
- Place: Carlsbad, NM · CARLSBAD, NM
- Location: 32.4207° N, 104.2288° W: Placed by OpenAirDocs: center of Carlsbad, NM, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.4207&lon=-104.2288&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 26, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 123736
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW81DQD34
- Page: https://openairdocs.org/ntsb/FTW81DQD34

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1963  81/9/11    CARLSBAD,NM         BENSEN B8M          CR-  0  0  1  MISCELLANEOUS             PRIVATE, AGE 27, 112
        TIME - 1000                    N4218Z              PX-  0  0  0  TEST                      TOTAL HOURS, 38 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - CAVERN CITY
        DEPARTURE POINT             INTENDED DESTINATION
          CARLSBAD,NM                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: CLIMB TO CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - FUEL SYSTEM: RAM AIR ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADES
           POWERPLANT - MISCELLANEOUS: FOREIGN OBJECT DAMAGE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
           TERRAIN - WET,SOFT GROUND
           TERRAIN - ROUGH/UNEVEN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  UNUSUAL NOISE
                                  PROP/ENGINE VIBRATION
        REMARKS- AIR CLEANER SEPARATED,DMGD PROP.LNDD IN CANYON.
```

## Aircraft

- Registration: [N4218Z](https://openairdocs.org/deregistered/N4218Z-2014-12-02), registration cancelled 2014-12-02, S/N C7700 (OpenAirDocs)
- Reported make and model: BENSEN B8M
- Registry model: [Canion James L BENSEN B8M](https://openairdocs.org/model/canion-james-l-bensen-b8m) (registry code 13021EQ) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Cavern City

## 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 19810911062549A](https://openairdocs.org/incident/19810911062549A), Sep 11, 1981: Amtrbx BENSENB8M, Carlsbad, NM, Substantial damage. Air cleaner broke off and went through prop. Aircraft crashed during emergency landing.

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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