# NTSB SEA77DYM48: Buffum Mini Coupe, N75MB, Willsonville, OR, July 23, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 23, 1977
- Place: Willsonville, OR · WILLSONVILLE, OR
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 29, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 145850
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA77DYM48
- Page: https://openairdocs.org/ntsb/SEA77DYM48

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2793  77/7/23    WILLSONVILLE,OR     BUFFUM MINI COUPE   CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 50, 222
        TIME - 0945                    N75MB               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 65 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          EVERGREEN,WA                HUBBARD,OR                   SCAPPOOSE,OR
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - LOOSE,PART/FITTING
           MISCELLANEOUS ACTS,CONDITIONS - LOW COMPRESSION
           TERRAIN - HIGH VEGETATION
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- VW 1600CC ENGINE.LOCK WSHR BROKE AND LOOSENED HOLD DOWN NUT.INTAKE ROCKER DISENGAGED FM PUSH ROD.
```

## Aircraft

- Registration: [N75MB](https://openairdocs.org/deregistered/N75MB-2012-10-19), registration cancelled 2012-10-19, S/N MC-112, built 1975 (OpenAirDocs)
- Reported make and model: BUFFUM MINI COUPE
- Registry model: [Buffum MINI-COUPE](https://openairdocs.org/model/buffum-mini-coupe) (registry code 0565410) (OpenAirDocs)
- Registry engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- 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 19770723022769A](https://openairdocs.org/incident/19770723022769A), Jul 23, 1977: Amtr 0565410, Willsonville, OR, Substantial damage. Vw 1600CC engine. Lock wshr broke and loosened hold down nut. Intake rocker disengaged fm push rod.

## Other investigations on N75MB (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 SEA78FYM50](https://openairdocs.org/ntsb/SEA78FYM50), Aug 30, 1978: Mini Coupe Buffum (N75MB), Independence, OR, destroyed, 1 fatal

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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