# NTSB SEA79FYM52: Cessna 150, N51321, Sisters, OR, July 21, 1979

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: July 21, 1979
- Place: Sisters, OR · SISTERS, OR
- Location: 44.2924° N, 121.5530° W: Placed by OpenAirDocs: center of Sisters, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.2924&lon=-121.5530&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report November 9, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 134196
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA79FYM52
- Page: https://openairdocs.org/ntsb/SEA79FYM52

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2472  79/7/21  NR.SISTERS,OR         CESSNA 150          CR-  0  1  0  NONCOMMERCIAL             STUDENT, AGE 37, 108
        TIME - 1515                    N51321              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 107 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ALBANY,OR                   BEND,OR
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- NR 1 EXHAUST VALVE SPRING RETAINER (PN 24027) FAILED.
```

## Aircraft

- Registration: [N51321](https://openairdocs.org/deregistered/N51321-1982-12-06), registration cancelled 1982-12-06, S/N 15069922 (OpenAirDocs)
- Reported make and model: CESSNA 150
- Registry model: [Cessna 150J](https://openairdocs.org/model/cessna-150j) (registry code 2071820) (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 19790721028749A](https://openairdocs.org/incident/19790721028749A), Jul 21, 1979: Cessna 150J, Sisters, OR, Substantial damage. Engine lost power, acft crashed during attempted emergency landing by student pilot.

## Other investigations on N51321 (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 UNK75X0106](https://openairdocs.org/ntsb/UNK75X0106), Apr 30, 1975: Cessna 150 (N51321), Chemult, OR, substantial damage
- [NTSB LAX70DUJ37](https://openairdocs.org/ntsb/LAX70DUJ37), May 26, 1970: Cessna 150 (N51321), Carefree, AZ, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.