# NTSB SEA71DVQ09: Piper PA-20, N7640K, Klamath Flls, OR, August 31, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 31, 1970
- Place: Klamath Flls, OR · KLAMATH FLLS, OR
- Location: 42.2158° N, 121.7758° W: Placed by OpenAirDocs: center of Klamath Falls, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.2158&lon=-121.7758&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 11, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 127919
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA71DVQ09
- Page: https://openairdocs.org/ntsb/SEA71DVQ09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3598  70/8/31    KLAMATH FLLS,OREG   PIPER PA-20         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 0930                    N7640K              PX-  0  0  0  DUAL                      AGE 44, 2979 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            41 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - KLAMATH FALLS MUN
        DEPARTURE POINT             INTENDED DESTINATION
          KLAMATH FLLS,OREG           LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: TAILWHEEL ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        REMARKS- STEERABLE TAILWHEEL,L SPRING FAILED.
```

## Aircraft

- Registration: [N7640K](https://openairdocs.org/deregistered/N7640K-2018-02-20), registration cancelled 2018-02-20, S/N 20-460, 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 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Klamath Falls Mun

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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