# NTSB SEA68D0099: Grumman G-21A, N640, Sandy, OR, August 5, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 5, 1967
- Place: Sandy, OR · SANDY, OR
- Location: 45.3981° N, 122.2688° W: Placed by OpenAirDocs: center of Sandy, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.3981&lon=-122.2688&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 11, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 115363
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA68D0099
- Page: https://openairdocs.org/ntsb/SEA68D0099

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3257   67/8/5    SANDY,OREG          GRUMMAN G-21A       CR-  0  0  1  MISCELLANEOUS             PRIVATE, AGE 62, 10000
        TIME - 1530                    N640                PX-  0  0  0  TEST                      TOTAL HOURS, 3000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - MCKINNON
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 TAXI: FROM LANDING
           COLLIDED WITH: DITCHES                                   TAXI: FROM LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
        REMARKS- EVALUATING PROP SURGING WHILE TAXIING.
```

## Aircraft

- Registration: [N640](https://openairdocs.org/deregistered/N640-2001-07-06), registration cancelled 2001-07-06, S/N B-123 (OpenAirDocs)
- Reported make and model: GRUMMAN G-21A
- Registry model: [Grumman G-21A](https://openairdocs.org/model/grumman-g-21a) (registry code 3951204) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: Substantial damage
- Airport: Mckinnon

## Other investigations on N640 (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 ANC67D0063](https://openairdocs.org/ntsb/ANC67D0063), Aug 31, 1966: Grumman G-21 (N640), Alegnagik, AK, 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.

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