# NTSB OAK77DVD47: Grum Amer AA5A, N9798U, Concord, CA, August 6, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 6, 1977
- Place: Concord, CA · CONCORD, CA
- Location: 37.9722° N, 122.0016° W: Placed by OpenAirDocs: center of Concord, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9722&lon=-122.0016&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 7, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146675
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK77DVD47
- Page: https://openairdocs.org/ntsb/OAK77DVD47

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1794   77/8/6    CONCORD,CA          GRUM AMER AA5A      CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 25, 515
        TIME - 1010                    N9798U              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 12 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - BUCHANAN FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          BAKERSFIELD,CA              CONCORD,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           PILOT IN COMMAND - IMPROPER COMPENSATION FOR WIND CONDITIONS
```

## Aircraft

- Registration: [N9798U](https://openairdocs.org/aircraft/N9798U), registered now, S/N AA5A0198, built 1976 (OpenAirDocs)
- Reported make and model: GRUM AMER AA5A
- Registry model: [Grumman American Avn. AA-5A](https://openairdocs.org/model/grumman-american-avn-aa-5a) (registry code 3960106) (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
- Airport: Buchanan Field

## 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 19770806022459A](https://openairdocs.org/incident/19770806022459A), Aug 6, 1977: Grumav AA5A, Concord, CA, 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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