# NTSB LAX77DUM21: Schweizer SGS233, N5797S, San Diego, CA, March 12, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 12, 1977
- Place: San Diego, CA · SAN DIEGO, CA
- Location: 32.7153° N, 117.1573° W: Placed by OpenAirDocs: center of San Diego, CA, within about 10 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.7153&lon=-117.1573&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 29, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 157729
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX77DUM21
- Page: https://openairdocs.org/ntsb/LAX77DUM21

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0442  77/3/12    SAN DIEGO,CA        SCHWEIZER SGS233    CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1300                    N5797S              PX-  0  0  0  DUAL                      AGE 25, 258 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            46 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - TORREY PINES
        DEPARTURE POINT             INTENDED DESTINATION
          SAN DIEGO,CA                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: OBJECT                                    LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           DUAL STUDENT - MISJUDGED CLEARANCE
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        REMARKS- PREMATURE RELEASE DRG TKOF TO SIMULATE WINCH CABLE BREAK.HIT SIGN.
```

## Aircraft

- Registration: [N5797S](https://openairdocs.org/deregistered/N5797S-2015-05-20), registration cancelled 2015-05-20, S/N 118, built 1968 (OpenAirDocs)
- Reported make and model: SCHWEIZER SGS233
- Registry model: [Schweizer SGS 2-33A](https://openairdocs.org/model/schweizer-sgs-2-33a) (registry code 8051606) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Engines: none
- Damage: Substantial damage
- Airport: Torrey Pines

## 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 19770312006159A](https://openairdocs.org/incident/19770312006159A), Mar 12, 1977: Scwzer SGS233A, San Diego, CA, Substantial damage. Premature release drg tkof to simulate winch cable break. Hit sign.

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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