# NTSB SEA77FTA22: Piper PA-20, N7635K, Ismay, MT, May 1, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 1, 1977
- Place: Ismay, MT · ISMAY, MT
- Location: 46.5002° N, 104.7929° W: Placed by OpenAirDocs: center of Ismay, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.5002&lon=-104.7929&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 29, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 147570
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA77FTA22
- Page: https://openairdocs.org/ntsb/SEA77FTA22

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1442   77/5/1    ISMAY,MT            PIPER PA-20         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 28, 250
        TIME - 1030                    N7635K              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 100 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MANDAN,ND                   ISMAY,MT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        REMARKS- LANDING IN ALFALFA FLD,SWERVED LEFT,NOSED OVER.
```

## Aircraft

- Registration: [N7635K](https://openairdocs.org/aircraft/N7635K), registered now, S/N 20-454, built 1950 (OpenAirDocs)
- Reported make and model: PIPER PA-20
- Registry model: [Piper PA-20](https://openairdocs.org/model/piper-pa-20) (registry code 7102002) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- 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 19770501016059A](https://openairdocs.org/incident/19770501016059A), May 1, 1977: Piper PA20, Ismay, MT, Substantial damage. Landing in alfalfa fld,swerved left,nosed over.

## Other investigations on N7635K (2)

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 ANC26FA057](https://openairdocs.org/ntsb/ANC26FA057), Jun 18, 2026: Piper PA20 (N7635K), Cordova, AK, destroyed, 1 fatal, investigation ongoing
- [NTSB LAX08CA255](https://openairdocs.org/ntsb/LAX08CA255), Aug 3, 2008: Piper PA-20 (N7635K), Grass Valley, CA, substantial damage. Probable cause: The pilot's failure to maintain directional control due to his foot slipping off one rudder pedal while braking.

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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