# NTSB OAK73DVG55: Schweizer SGS233, N2473W, Vacaville, CA, March 31, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 31, 1973
- Place: Vacaville, CA · VACAVILLE, CA
- Location: 38.3586° N, 121.9686° W: Placed by OpenAirDocs: center of Vacaville, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.3586&lon=-121.9686&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 18, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 170343
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK73DVG55
- Page: https://openairdocs.org/ntsb/OAK73DVG55

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0713  73/3/31    VACAVILLE,CALIF     SCHWEIZER SGS233    CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1030                    N2473W              PX-  0  0  0  DUAL                      AGE 31, 3410 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            400 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - VACAVILLE
        DEPARTURE POINT             INTENDED DESTINATION
          VACAVILLE,CALIF             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: PARKED AIRCRAFT                           TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
        FACTOR(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
           MISCELLANEOUS ACTS,CONDITIONS - INSTRUCTIONS-MISINTERPRETED
        REMARKS- GLIDER PLT USED IMPROPER HAND SIGNALS.TOW PLT OPENED THROTTLE.N2473W HIT SGS233 N7764S,MINOR DMG.
```

## Aircraft

- Registration: [N2473W](https://openairdocs.org/deregistered/N2473W-1974-05-21), registration cancelled 1974-05-21, S/N 29, built 1967 (OpenAirDocs)
- Reported make and model: SCHWEIZER SGS233
- Registry model: [Schweizer SGS 2-33](https://openairdocs.org/model/schweizer-sgs-2-33) (registry code 8051604) (OpenAirDocs)
- Category: Glider
- Engines: none
- Damage: Substantial damage
- Airport: Vacaville

## 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 19730331007129A](https://openairdocs.org/incident/19730331007129A), Mar 31, 1973: Scwzer SGS233, Vacaville, CA, Substantial damage. Glider plt used improper hand signals. Tow plt opened throttle.N2473W hit SGS233 N7764S,minor dmg.

## Other investigations on N2473W (3)

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 OAK74DVG36](https://openairdocs.org/ntsb/OAK74DVG36), Apr 6, 1974: Schweizer SGS233 (N2473W), Vacaville, CA, destroyed
- [NTSB OAK73DVG18](https://openairdocs.org/ntsb/OAK73DVG18), Sep 10, 1972: Schweizer 2-33 (N2473W), Vacaville, CA, substantial damage
- [NTSB OAK71DVD33](https://openairdocs.org/ntsb/OAK71DVD33), Mar 12, 1971: Schweizer 2-33 (N2473W), Livermore, 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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