# NTSB OAK73DVG09: Blanik L-13, N3457, Angwin, CA, August 5, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 5, 1972
- Place: Angwin, CA · ANGWIN, CA
- Location: 38.5779° N, 122.4512° W: Placed by OpenAirDocs: center of Angwin, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.5779&lon=-122.4512&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 22, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 168162
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK73DVG09
- Page: https://openairdocs.org/ntsb/OAK73DVG09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2298   72/8/5    ANGWIN,CALIF        BLANIK L-13         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 51, 292
        TIME - 1445                    N3457               PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ANGWIN,CALIF                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: OBJECT                                    LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
           WEATHER - OTHER
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          HAZE                                                      80
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          270                                                       15
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- ACFT ENCOUNTERED WEAK LIFT CONDITIONS.LNDD IN ROCKY FIELD.
```

## Aircraft

- Registration: [N3457](https://openairdocs.org/deregistered/N3457-2014-10-02), registration cancelled 2014-10-02, S/N 174215, built 1970 (OpenAirDocs)
- Reported make and model: BLANIK L-13
- Registry model: [Let BLANIK L-13](https://openairdocs.org/model/let-blanik-l-13) (registry code 1360306) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Glider, amateur-built
- Engines: none
- Damage: 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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