# NTSB CHI77FEP59: Bell 47J2A, N6769D, Plymouth, WI, September 5, 1977

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 5, 1977
- Place: Plymouth, WI · PLYMOUTH, WI
- Location: 43.7433° N, 87.9657° W: Placed by OpenAirDocs: center of Plymouth, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.7433&lon=-87.9657&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 4 uninjured
- Status: Completed, report November 16, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 145174
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI77FEP59
- Page: https://openairdocs.org/ntsb/CHI77FEP59

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2921   77/9/5    PLYMOUTH,WI         BELL 47J2A          CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 31, 2987
        TIME - 1500                    N6769D              PX-  0  0  4  OTHER                     TOTAL HOURS, 52 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          PLYMOUTH,WI                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: CLIMB TO CRUISE
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: CYLINDER ASSEMBLY
           POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - SCORED
           MISCELLANEOUS ACTS,CONDITIONS - PRESSURE,NONE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- SIGHTSEEING.
```

## Aircraft

- Registration: [N6769D](https://openairdocs.org/deregistered/N6769D-1983-11-01), registration cancelled 1983-11-01, S/N 1793 (OpenAirDocs)
- Reported make and model: BELL 47J2A
- Registry model: [Bell 47J](https://openairdocs.org/model/bell-47j) (registry code 1181102) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## 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 19770905032479A](https://openairdocs.org/incident/19770905032479A), Sep 5, 1977: Dhav DHC2MK1, WI, 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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