# NTSB UNK64X2935: Bell 47D1, N1161N, Toppenish, WA, July 19, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 19, 1964
- Place: Toppenish, WA · TOPPENISH, WA
- Location: 46.3802° N, 120.3126° W: Placed by OpenAirDocs: center of Toppenish, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.3802&lon=-120.3126&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 30, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 183704
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X2935
- Page: https://openairdocs.org/ntsb/UNK64X2935

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0913  64/7/19  NR.TOPPENISH WASH     BELL 47D1           CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 36, 200
        TIME - 0545                    N1161N              PX-  0  0  1  FERRY                     TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: DIRT BANK                                 TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
          ROTORCFT-CYCLIC CONTROL JAMMED,REASON UNDETERMINED
        FACTOR(S)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: CYCLIC PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - JAMMED
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
```

## Aircraft

- Registration: [N1161N](https://openairdocs.org/deregistered/N1161N-2017-02-16), registration cancelled 2017-02-16, S/N 42, built 1948 (OpenAirDocs)
- Reported make and model: BELL 47D1
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N1161N (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 SEA89LA120](https://openairdocs.org/ntsb/SEA89LA120), Jun 24, 1989: Bell 47G-2 (N1161N), Centralia, WA, destroyed. Probable cause: THE PILOT MISJUDGED HIS CLEARANCE OVER TREES, WHICH RESULTED IN AN IN-FLIGHT TAIL ROTOR STRIKE WITH THE TREES AND LOSS OF TAIL ROTOR CONTROL. THE TREES WERE A RELATED FACTOR.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.