# NTSB ANC67D0063: Grumman G-21, N640, Alegnagik, AK, August 31, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 31, 1966
- Place: Alegnagik, AK · ALEGNAGIK, AK
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 30, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 120780
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC67D0063
- Page: https://openairdocs.org/ntsb/ANC67D0063

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3245  66/8/31    ALEGNAGIK ALAS      GRUMMAN G-21        CR-  0  0  1  MISCELLANEOUS             ATP,FLIGHT INSTR., AGE
        TIME - 0820                    N640                PX-  0  0  1  OTHER PUBLIC              53, 12000 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            800 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - TRIPOD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: FINAL APPROACH
           NOSE OVER/DOWN                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED ALTITUDE AND CLEARANCE
        FACTOR(S)
           TERRAIN - GLASSY WATER
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
```

## 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-21
- Registry model: [Grumman G-21A](https://openairdocs.org/model/grumman-g-21a) (registry code 3951204) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Tripod

## 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 SEA68D0099](https://openairdocs.org/ntsb/SEA68D0099), Aug 5, 1967: Grumman G-21A (N640), Sandy, OR, 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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