# NTSB OAK75DVD06: Amer Avco AA1-B, N9602L, Concord, CA, August 18, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 18, 1974
- 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 18, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 134489
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK75DVD06
- Page: https://openairdocs.org/ntsb/OAK75DVD06

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2409  74/8/18    CONCORD,CALIF       AMER AVCO AA1-B     CR-  0  0  1  INSTRUCTIONAL             STUDENT, AGE 34, 27 TOTAL
        TIME - 1030                    N9602L              PX-  0  0  0  SOLO                      HOURS, ALL IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - BUCHANAN FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          CONCORD,CALIF               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE
           MISCELLANEOUS ACTS,CONDITIONS - TOUCH AND GO LANDING
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  PROP/ENGINE VIBRATION
        REMARKS- TWR PERS OBSVD PLT LND HARD THEN GO ARND. GR FAILED NEXT LDG.
```

## Aircraft

- Registration: [N9602L](https://openairdocs.org/deregistered/N9602L-2013-09-13), registration cancelled 2013-09-13, S/N AA1B-0102, built 1973 (OpenAirDocs)
- Reported make and model: AMER AVCO AA1-B
- Registry model: [Grumman American Avn. AA-1B](https://openairdocs.org/model/grumman-american-avn-aa-1b) (registry code 3960103) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (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 19740818026989A](https://openairdocs.org/incident/19740818026989A), Aug 18, 1974: Grumav AA1B, Concord, CA, Substantial damage. Twr pers obsvd plt lnd hard then go arnd. Gr failed next ldg.

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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