# NTSB NYC69F0261: Bensen B8M, N4791G, Ivyland, PA, November 24, 1968

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: November 24, 1968
- Place: Ivyland, PA · IVYLAND, PA
- Location: 40.2080° N, 75.0735° W: Placed by OpenAirDocs: center of Ivyland, PA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.2080&lon=-75.0735&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report January 23, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 107321
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC69F0261
- Page: https://openairdocs.org/ntsb/NYC69F0261

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4167  68/11/24   IVYLAND,PA          BENSEN B8M          CR-  0  0  1  NONCOMMERCIAL             ATP,FLIGHT INSTR., AGE
        TIME - 1500                    N4791G              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  28, 4964 TOTAL HOURS, 85
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      TAKEOFF: INITIAL CLIMB
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- 19 INCHES OF ROTOR BLADE BROKE OFF.
```

## Aircraft

- Registration: [N4791G](https://openairdocs.org/deregistered/N4791G-1970-06-12), registration cancelled 1970-06-12, S/N TYH-1 (OpenAirDocs)
- Reported make and model: BENSEN B8M
- Registry model: [Huf-Bensen B-8M](https://openairdocs.org/model/huf-bensen-b-8m) (registry code 130075J) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed

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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