# NTSB NYC74FHM12: Brantly B-2, N5946X, North Bergen, NJ, November 21, 1973

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: November 21, 1973
- Place: North Bergen, NJ · NORTH BERGEN, NJ
- Location: 40.8043° N, 74.0121° W: Placed by OpenAirDocs: center of North Bergen, NJ, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.8043&lon=-74.0121&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report February 1, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187969
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC74FHM12
- Page: https://openairdocs.org/ntsb/NYC74FHM12

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3668  73/11/21   NORTH BERGEN,NJ     BRANTLY B-2         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 49, 11953
        TIME - 1345                    N5946X              PX-  0  0  0  BUSINESS                  TOTAL HOURS, 22 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          FLUSHING,NY                 NORTH BERGEN,NJ
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      LANDING: GO-AROUND
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: GO-AROUND
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
         FIRE AFTER IMPACT
        REMARKS- VERT DRIVE P/N 249-10 FAILED AT BOLT HOLES 1 IN FM UPR END OF SHAFT.UPR GR BOX ASSEM REPLACED 6/68
```

## Aircraft

- Registration: [N5946X](https://openairdocs.org/deregistered/N5946X-1974-01-23), registration cancelled 1974-01-23, S/N 85 (OpenAirDocs)
- Reported make and model: BRANTLY B-2
- Registry model: [Brantly B-2](https://openairdocs.org/model/brantly-b-2) (registry code 1440502) (OpenAirDocs)
- Category: Helicopter
- 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 19731121038679A](https://openairdocs.org/incident/19731121038679A), Nov 21, 1973: Hynes B2, North Bergen, NJ, Destroyed. Vert drive p/n 249-10 failed at bolt holes 1 in fm upr end of shaft. Upr gr box assem replaced 6/68

## Other investigations on N5946X (1)

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.

- [NTSB NYC70FHJ03](https://openairdocs.org/ntsb/NYC70FHJ03), Mar 6, 1970: Brantly B-2 (N5946X), Lindenhurst, NY, 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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