# NTSB MKC79DER74: Pietenpol Aircmp, N25157, Minneapolis, MN, September 21, 1979

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 21, 1979
- Place: Minneapolis, MN · MINNEAPOLIS, MN
- Location: 44.9800° N, 93.2638° W: Placed by OpenAirDocs: center of Minneapolis, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.9800&lon=-93.2638&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 17, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 133589
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC79DER74
- Page: https://openairdocs.org/ntsb/MKC79DER74

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2737  79/9/21    MINNEAPOLIS,MN      PIETENPOL AIRCMP    CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 67, 393
        TIME - 1030                    N25157              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 5 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ANOKA CO-BLAINE
        DEPARTURE POINT             INTENDED DESTINATION
          MINNEAPOLIS,MN              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: MAIN GEAR-SHOCK ABSORBING ASSY,STRUTS,ATTACHMENTS,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - POOR WELD
        REMARKS- L MAIN GEAR FAILED AT WELDED AREA.WELD CRYSTALIZED & GRANULAR.
```

## Aircraft

- Registration: [N25157](https://openairdocs.org/deregistered/N25157-2013-08-06), registration cancelled 2013-08-06, S/N 113EHK, built 1978 (OpenAirDocs)
- Reported make and model: PIETENPOL AIRCMP
- Registry model: [Kirchner PIETENPOL AIRCAMPER](https://openairdocs.org/model/kirchner-pietenpol-aircamper) (registry code 7040319) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Anoka Co-Blaine

## 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 19790921031679A](https://openairdocs.org/incident/19790921031679A), Sep 21, 1979: Amtrpl AIRCAMPER, Minneapolis, MN, Substantial damage. Left landing gear wheel & axle separated from aircraft on landing roll. Veered off runway. Defect in welding.

## Other investigations on N25157 (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 FTW01LA120](https://openairdocs.org/ntsb/FTW01LA120), May 17, 2001: Kirchner Pietenpol Aircamper (N25157), Tulsa, OK, substantial damage. Probable cause: the pilot's inadequate flare during the forced landing, which resulted in a hard landing. A contributing factor was the engine overheating due a stuck oil cooler thermostat valve, which resulted in a…

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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