# NTSB CHI71FEP54: Pietenpol GN-1, N4705G, Menomonee Fls, WI, June 19, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 19, 1971
- Place: Menomonee Fls, WI · MENOMONEE FLS, WI
- Location: 43.1789° N, 88.1173° W: Placed by OpenAirDocs: center of Menomonee Falls, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.1789&lon=-88.1173&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 February 23, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 161846
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI71FEP54
- Page: https://openairdocs.org/ntsb/CHI71FEP54

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2273  71/6/19    MENOMONEE FLS,WIS   PIETENPOL GN-1      CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 43, 270
        TIME - 1715                    N4705G              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 19 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - AERO PARK
        DEPARTURE POINT             INTENDED DESTINATION
          MENOMONEE FLS,WIS           LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL                                                    TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - PREMATURE LIFT-OFF
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
```

## Aircraft

- Registration: [N4705G](https://openairdocs.org/deregistered/N4705G-1973-06-25), registration cancelled 1973-06-25, S/N 91307 (OpenAirDocs)
- Reported make and model: PIETENPOL GN-1
- Registry model: [Pietenpol GN-1](https://openairdocs.org/model/pietenpol-gn-1) (registry code 70401RZ) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Aero Park

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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